release/doc/en_US.ISO8859-1/relnotes/article.xml

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   4 <!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN" "release.ent">
   5  %release;
   6 <!ENTITY % sponsor PUBLIC "-//FreeBSD//ENTITIES Sponsor Specification//EN" "sponsor.ent">
   7  %sponsor;
   8 <!ENTITY % vendor PUBLIC "-//FreeBSD//ENTITIES Vendor Specification//EN" "vendor.ent">
   9  %vendor;
  10 <!ENTITY security SYSTEM "../../share/xml/security.xml">
  11 <!ENTITY errata SYSTEM "../../share/xml/errata.xml">
  12 ]>
  13 <article xmlns="http://docbook.org/ns/docbook"
  14   xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
  15
  16   <info>
  17     <title>&os; &release.current; Release Notes</title>
  18
  19     <author>
  20       <orgname>The &os; Project</orgname>
  21     </author>
  22
  23     <pubdate>$FreeBSD$</pubdate>
  24
  25     <!-- Last rev: 288943 -->
  26
  27     <copyright>
  28       <year>2017</year>
  29       <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
  30         Project</holder>
  31     </copyright>
  32
  33     <legalnotice xml:id="trademarks" role="trademarks">
  34       &tm-attrib.freebsd;
  35       &tm-attrib.ibm;
  36       &tm-attrib.ieee;
  37       &tm-attrib.intel;
  38       &tm-attrib.sparc;
  39       &tm-attrib.general;
  40     </legalnotice>
  41
  42     <abstract>
  43       <para>The release notes for &os; &release.current; contain
  44         a summary of the changes made to the &os; base system on the
  45         &release.branch; development line.  This document lists
  46         applicable security advisories that were issued since the last
  47         release, as well as significant changes to the &os; kernel and
  48         userland.  Some brief remarks on upgrading are also
  49         presented.</para>
  50     </abstract>
  51   </info>
  52
  53   <sect1 xml:id="intro">
  54     <title>Introduction</title>
  55
  56     <para>This document contains the release notes for &os;
  57       &release.current;.  It describes recently added, changed, or
  58       deleted features of &os;.  It also provides some notes on
  59       upgrading from previous versions of &os;.</para>
  60
  61     <para releasetype="current">The &release.type; distribution to
  62       which these release notes apply represents the latest point
  63       along the &release.branch; development branch since
  64       &release.branch; was created.  Information regarding pre-built,
  65       binary &release.type; distributions along this branch can be
  66       found at <uri
  67         xlink:href="&release.url;">&release.url;</uri>.</para>
  68
  69     <para releasetype="snapshot">The &release.type; distribution to
  70       which these release notes apply represents a point along the
  71       &release.branch; development branch between &release.prev; and
  72       the future &release.next;.  Information regarding pre-built,
  73       binary &release.type; distributions along this branch can be
  74       found at <uri
  75         xlink:href="&release.url;">&release.url;</uri>.</para>
  76
  77     <para releasetype="release">This distribution of &os;
  78       &release.current; is a &release.type; distribution.  It can be
  79       found at <uri xlink:href="&release.url;">&release.url;</uri> or
  80       any of its mirrors.  More information on obtaining this (or
  81       other) &release.type; distributions of &os; can be found in the
  82       <link
  83         xlink:href="&url.books.handbook;/mirrors.html"><quote>Obtaining
  84           &os;</quote> appendix</link> to the <link
  85         xlink:href="&url.books.handbook;/">&os;
  86         Handbook</link>.</para>
  87
  88     <para>All users are encouraged to consult the release errata
  89       before installing &os;.  The errata document is updated with
  90       <quote>late-breaking</quote> information discovered late in the
  91       release cycle or after the release.  Typically, it contains
  92       information on known bugs, security advisories, and corrections
  93       to documentation.  An up-to-date copy of the errata for &os;
  94       &release.current; can be found on the &os; Web site.</para>
  95
  96     <para>This document describes the most user-visible new or changed
  97       features in &os; since &release.prev;.  In general, changes
  98       described here are unique to the &release.branch; branch unless
  99       specifically marked as &merged; features.</para>
 100
 101     <para>Typical release note items document recent security
 102       advisories issued after &release.prev;, new drivers or hardware
 103       support, new commands or options, major bug fixes, or
 104       contributed software upgrades.  They may also list changes to
 105       major ports/packages or release engineering practices.  Clearly
 106       the release notes cannot list every single change made to &os;
 107       between releases; this document focuses primarily on security
 108       advisories, user-visible changes, and major architectural
 109       improvements.</para>
 110   </sect1>
 111
 112   <sect1 xml:id="upgrade">
 113     <title>Upgrading from Previous Releases of &os;</title>
 114
 115     <para arch="amd64,i386">Binary upgrades between RELEASE versions
 116       (and snapshots of the various security branches) are supported
 117       using the &man.freebsd-update.8; utility.  The binary upgrade
 118       procedure will update unmodified userland utilities, as well as
 119       unmodified GENERIC kernels distributed as a part of an official
 120       &os; release.  The &man.freebsd-update.8; utility requires that
 121       the host being upgraded have Internet connectivity.</para>
 122
 123     <para>Source-based upgrades (those based on recompiling the &os;
 124       base system from source code) from previous versions are
 125       supported, according to the instructions in
 126       <filename>/usr/src/UPDATING</filename>.</para>
 127
 128     <important>
 129       <para>Upgrading &os; should only be attempted after backing up
 130         <emphasis>all</emphasis> data and configuration files.</para>
 131     </important>
 132   </sect1>
 133
 134   <sect1 xml:id="security-errata">
 135     <title>Security and Errata</title>
 136
 137     <para>This section lists the various Security Advisories and
 138       Errata Notices since &release.prev;.</para>
 139
 140     <sect2 xml:id="security">
 141       <title>Security Advisories</title>
 142
 143       &security;
 144     </sect2>
 145
 146     <sect2 xml:id="errata">
 147       <title>Errata Notices</title>
 148
 149       &errata;
 150     </sect2>
 151   </sect1>
 152
 153   <sect1 xml:id="userland">
 154     <title>Userland</title>
 155
 156     <para>This section covers changes and additions to userland
 157       applications, contributed software, and system utilities.</para>
 158
 159     <sect2 xml:id="userland-config">
 160       <title>Userland Configuration Changes</title>
 161
 162       <para revision="313203">The &man.inetd.8; utility is now built
 163         without <literal>libwrap</literal> support when
 164         <literal>WITHOUT_TCP_WRAPPERS</literal> is set in
 165         &man.src.conf.5;.</para>
 166
 167       <para revision="316045">The &man.libthr.3; library and related
 168         files are now evaluated and removed by the
 169         <literal>delete-old-libs</literal> target when upgrading the
 170         system if <literal>WITHOUT_LIBTHR</literal> is
 171         set in &man.src.conf.5;.</para>
 172
 173       <para revision="316423" contrib="sponsor" sponsor="&ff;">The
 174         <literal>WITH_LLD_AS_LD</literal> build knob has been added,
 175         which installs <application>LLD</application> as
 176         <filename>/usr/bin/ld</filename> if set.</para>
 177     </sect2>
 178
 179     <sect2 xml:id="userland-programs">
 180       <title>Userland Application Changes</title>
 181
 182       <para revision="305476" contrib="sponsor"
 183         sponsor="&ff;">Support for &man.blacklistd.8; has been added
 184         to <application>OpenSSH</application>.</para>
 185
 186       <para revision="308720" contrib="sponsor" sponsor="&gandi;">The
 187         &man.cron.8; utility has been updated to add support for
 188         including files within <filename
 189           class="directory">/etc/cron.d</filename> and <filename
 190           class="directory">/usr/local/etc/cron.d</filename> by
 191         default.</para>
 192
 193       <para revision="308721" contrib="sponsor" sponsor="&gandi;">The
 194         &man.syslogd.8; utility has been updated to add the
 195         <literal>include</literal> keyword which allows specifying
 196         a directory containing configuration files to be included in
 197         addition to &man.syslog.conf.5;.  The default
 198         &man.syslog.conf.5; has been updated to include <filename
 199           class="directory">/etc/syslog.d</filename> and <filename
 200           class="directory">/usr/local/etc/syslog.d</filename> by
 201         default.</para>
 202
 203       <para revision="308914">The &man.zfsbootcfg.8; utility has been
 204         added, providing one-time &man.boot.config.5;-style options
 205         for &man.zfsboot.8;.</para>
 206
 207       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 208         &man.setkey.8; utility has been modified to show the runtime
 209         <acronym>NAT-T</acronym> configuration.  The
 210         <literal>-g</literal> and <literal>-t</literal> flags have
 211         been added, which list only global and virtual policies,
 212         respectively, when used with the <literal>-D</literal> and
 213         <literal>-P</literal> flags.</para>
 214
 215       <para revision="316098" contrib="sponsor"
 216         sponsor="&dellemc;">The &man.getaddrinfo.1; utility has been
 217         added, ported from NetBSD.</para>
 218
 219       <para revision="316944" contrib="sponsor"
 220         sponsor="&multiplay;">The &man.jail.8; utility has been
 221         updated to allow explicitly-assigned <acronym>IPv4</acronym>
 222         and <acronym>IPv6</acronym> addresses to be used within
 223         a jail.</para>
 224
 225       <para revision="317855">The &man.daemon.8; utility has been
 226         updated to allow redirecting &man.stdout.4; and &man.stderr.4;
 227         output to &man.syslog.3; or to a file.</para>
 228     </sect2>
 229
 230     <sect2 xml:id="userland-contrib">
 231       <title>Contributed Software</title>
 232
 233       <para revision="307729">&man.unbound.8; has been updated to
 234         version 1.5.10.</para>
 235
 236       <para revision="309511"><application>Subversion</application>
 237         has been updated to version 1.9.5.</para>
 238
 239       <para revision="309847">&man.file.1; has been updated to version
 240         5.29.</para>
 241
 242       <para revision="310490">The &man.amd.8; utility has been updated
 243         to version 6.2.</para>
 244
 245       <para revision="312336">The <acronym>CLDR</acronym> locales have
 246         been updated to version 30.0.3.  The unicode locales have been
 247         updated to version 9.0.0.</para>
 248
 249       <para revision="312517">&man.xz.1; has been updated to version
 250         5.2.3.</para>
 251
 252       <para revision="313537">&man.tcpdump.1; has been updated to
 253         version 4.9.0.</para>
 254
 255       <para revision="313795">&man.zlib.3; has been updated to version
 256         1.2.11.</para>
 257
 258       <para revision="313980"><application>openresolv</application>
 259         has been updated to version 3.9.0.</para>
 260
 261       <para revision="313680">The NetBSD test suite has been updated
 262         to the 01.11.2017_23.20 snapshot.</para>
 263
 264       <para revision="314278"><literal>libucl</literal> has been
 265         updated to version 20170219.</para>
 266
 267       <para revision="315432">&man.libarchive.3; has been updated to
 268         version 3.3.1.</para>
 269
 270       <para revision="315995">&man.dma.8; has been updated to the
 271         2017-02-10 snapshot.</para>
 272
 273       <para revision="316068">&man.ntpd.8; has been updated to version
 274         4.2.8p10.</para>
 275
 276       <para revision="316303"><application>ACPICA</application> has
 277         been updated to version 20170303.</para>
 278
 279       <para revision="316349">Timezone data files have been updated to
 280         version 2017b.</para>
 281
 282       <para revision="316420">&man.mandoc.1; has been updated to
 283         version 1.14.</para>
 284
 285       <para revision="316423"><application>Clang</application> has
 286         been updated to version 4.0.0.</para>
 287
 288       <para revision="316423"><application>LLVM</application> has
 289         been updated to version 4.0.0.</para>
 290
 291       <para revision="316423"><application>LLD</application> has
 292         been updated to version 4.0.0.</para>
 293
 294       <para revision="316423"><application>LLDB</application> has
 295         been updated to version 4.0.0.</para>
 296
 297       <para revision="316423"><application>compiler-rt</application>
 298         has been updated to version 4.0.0.</para>
 299
 300       <para revision="316423"><application>libc++</application> has
 301         been updated to version 4.0.0.</para>
 302
 303       <para revision="316957">&man.tcsh.1; has been updated to version
 304         6.20.00.</para>
 305
 306       <para revision="318239" contrib="sponsor"
 307         sponsor="&ff;">&man.blacklistd.8; has been updated to the
 308         20170503 snapshot.</para>
 309
 310       <para revision="318402" contrib="sponsor"
 311         sponsor="&ff;">&man.blacklistd.8; support for
 312         <application>OpenSSH</application> has been refined to adjust
 313         notification points to catch all authentication failures
 314         rather than only those caused by invalid login
 315         usernames.</para>
 316     </sect2>
 317
 318     <sect2 xml:id="userland-installer">
 319       <title>Installation and Configuration Tools</title>
 320
 321       <para revision="311686">The &man.bsdinstall.8; installer has
 322         been updated to include support for hidden wireless networks
 323         when configuring the &man.wlan.4; interface.</para>
 324     </sect2>
 325
 326     <sect2 xml:id="userland-rc">
 327       <title><filename class="directory">/etc/rc.d</filename>
 328         Scripts</title>
 329
 330       <para revision="310009" contrib="sponsor"
 331         sponsor="&fisglobal;">The <literal>jail_confwarn</literal>
 332         &man.rc.conf.5; entry has been added, which suppresses warning
 333         about obsolete per-&man.jail.8; configurations.</para>
 334     </sect2>
 335
 336     <sect2 xml:id="userland-periodic">
 337       <title><filename class="directory">/etc/periodic</filename>
 338         Scripts</title>
 339
 340       <para revision="317373">The default &man.periodic.conf.5; has
 341         been updated to include the
 342         <literal>anticongestion_sleeptime</literal> option,
 343         consolidating random sleeps in &man.periodic.8; scripts and
 344         replacing the <literal>daily_ntpd_avoid_congestion</literal>
 345         option.  The default value is 3600 seconds.</para>
 346
 347       <para revision="317857">The <filename>410.status-mfi</filename>
 348         &man.periodic.8; script has been added to monitor the status
 349         of &man.mfi.4; volumes.</para>
 350     </sect2>
 351
 352     <sect2 xml:id="userland-libraries">
 353       <title>Runtime Libraries and API</title>
 354
 355       <para revision="316039">The &man.kvm.close.3; function has been
 356         updated to return the accumulated error from previous
 357         &man.close.2; calls.</para>
 358
 359       <para revision="317618" contrib="sponsor"
 360         sponsor="&dellemc;">The <function>clock_nanosleep()</function>
 361         system call has been added.  The
 362         <function>nanosleep()</function> system call is now a wrapper
 363         around <function>clock_nanosleep()</function>.</para>
 364     </sect2>
 365
 366     <sect2 xml:id="userland-abi">
 367       <title>ABI Compatibility</title>
 368
 369       <para revision="309258">The type <literal>max_align_t</literal>
 370         is now defined for C11 compliance.</para>
 371
 372       <para revision="315274" contrib="sponsor"
 373         sponsor="&dellemc;">The
 374         <function>sem_clockwait_np()</function> library function has
 375         been added, which allows the caller to specify the reference
 376         clock and choose between absolute and relative mode.</para>
 377
 378       <para revision="315282">The <application>clang</application>
 379         <literal>nullability</literal> attribute has been added to the
 380         <literal>C</literal> library headers.</para>
 381     </sect2>
 382
 383     <sect2 xml:id="userland-debug">
 384       <title>Userland Debugging</title>
 385
 386       <para revision="304499">&man.ptrace.2; now supports events for
 387         &man.vfork.2;, permitting reliable debugging across
 388         &man.vfork.2; invocations.</para>
 389
 390       <para revision="306786">Process core dumps now include the
 391         process ID (<acronym>PID</acronym> and command line
 392         arguments.</para>
 393     </sect2>
 394   </sect1>
 395
 396   <sect1 xml:id="kernel">
 397     <title>Kernel</title>
 398
 399     <para>This section covers changes to kernel configurations, system
 400       tuning, and system control parameters that are not otherwise
 401       categorized.</para>
 402
 403     <sect2 xml:id="kernel-bugfix">
 404       <title>Kernel Bug Fixes</title>
 405
 406       <para revision="317434">The &man.ipf.4; packet filter has been
 407         updated to prevent <literal>keep state</literal> from
 408         incorrectly implying <literal>keep frags</literal>, matching
 409         the behavior documented in &man.ipf.5;.</para>
 410     </sect2>
 411
 412     <sect2 xml:id="kernel-config">
 413       <title>Kernel Configuration</title>
 414
 415       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 416         <literal>IPSEC_NAT_T</literal> kernel configuration option has
 417         been removed.  Support for <acronym>NAT-T</acronym> is now
 418         enabled by default.</para>
 419
 420       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 421         <literal>IPSEC_FILTERTUNNEL</literal> kernel option has been
 422         removed, which was deprecated by the
 423         <literal>net.inet.ipsec.filtertunnel</literal> sysctl.</para>
 424     </sect2>
 425
 426     <sect2 xml:id="kernel-modules">
 427       <title>Kernel Modules</title>
 428
 429       <para revision="307144">&man.cloudabi.4; has been updated to
 430         allow running 32-bit binaries within 64-bit userland
 431         environments when the kernel configuration file has the
 432         <literal>COMPAT_CLOUDABI32</literal> option present.</para>
 433
 434       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 435         <literal>ipsec</literal> and <literal>tcpmd5</literal> kernel
 436         modules have been added.</para>
 437
 438       <para revision="316274" contrib="sponsor" sponsor="&yandex;">The
 439         &man.ipfw.4; packet filter has been updated to add support for
 440         named dynamic states.</para>
 441
 442       <para revision="316444" contrib="sponsor" sponsor="&yandex;">The
 443         <literal>ipfw_nptv6</literal> kernel module has been added,
 444         implementing Network Prefix Translation for
 445         <acronym>IPv6</acronym> as defined in <acronym>RFC</acronym>
 446         6296.</para>
 447
 448       <para revision="316446" contrib="sponsor" sponsor="&yandex;">The
 449         <literal>ipfw_nat64</literal> kernel module has been added,
 450         implementing stateless and stateful
 451         <acronym>NAT64</acronym>.</para>
 452
 453       <para revision="316660" contrib="sponsor" sponsor="&ff;">The
 454         &man.cfumass.4; device has been added, providing a storage
 455         frontend to <acronym>USB</acronym>
 456         <acronym>OTG</acronym>-capable hardware.</para>
 457
 458       <para revision="317045" contrib="sponsor" sponsor="&yandex;">The
 459         <literal>ipfw_pmod</literal> kernel module has been added,
 460         designed for modifying packets of any protocol.</para>
 461
 462       <note>
 463         <para>At present, only <acronym>TCP</acronym>
 464           <acronym>MSS</acronym> modification is implemented.</para>
 465       </note>
 466     </sect2>
 467
 468     <sect2 xml:id="kernel-sysctl">
 469       <title>System Tuning and Controls</title>
 470
 471       <para revision="315539">The
 472         <literal>vfs.root_mount_always_wait</literal> tunable has been
 473         added, which forces the kernel to wait for root mount holds
 474         even if the root device is already present.</para>
 475
 476       <para revision="316120" contrib="sponsor"
 477         sponsor="&dellemc;">When the system real time clock
 478         (<acronym>RTC</acronym>) is adjusted, such as by
 479         <function>clock_settime()</function>, sleeping threads are now
 480         awakened and absolute sleep times are reevaluated based on the
 481         new value of the RTC.</para>
 482     </sect2>
 483   </sect1>
 484
 485   <sect1 xml:id="drivers">
 486     <title>Devices and Drivers</title>
 487
 488     <para>This section covers changes and additions to devices and
 489       device drivers since &release.prev;.</para>
 490
 491     <sect2 xml:id="drivers-device">
 492       <title>Device Drivers</title>
 493
 494       <para revision="307768">The &man.jedec.ts.4; driver has been
 495         added, providing support for thermal sensors on memory
 496         modules.  The driver currently supports chips that are fully
 497         compliant with the <acronym>JEDEC</acronym>
 498         <acronym>JC</acronym> 42.4 specification.</para>
 499
 500       <para revision="308104">The &man.chromebook.platform.4; driver
 501         has been added, providing support for various Chromebook
 502         models.</para>
 503
 504       <para revision="308942">The &man.bytgpio.4; driver has been
 505         added, providing support for Intel&reg; Bay&nbsp;Trail&trade;
 506         SoC GPIO controllers.</para>
 507
 508       <para revision="312394"><filename>/dev/kmem</filename> no longer
 509         supports access via <function>mmap()</function>.  Consumers
 510         wishing to use <filename>/dev/kmem</filename> must use
 511         <function>read()</function> and
 512         <function>write()</function>.</para>
 513
 514       <para revision="306533" contrib="sponsor"
 515         sponsor="&chelsio;">&man.devctl.8; now supports a &quot;clear
 516         driver&quot; command as a complement to &quot;set
 517         driver&quot;.</para>
 518     </sect2>
 519
 520     <sect2 xml:id="drivers-storage">
 521       <title>Storage Drivers</title>
 522
 523       <para>&nbsp;</para>
 524     </sect2>
 525
 526     <sect2 xml:id="drivers-network">
 527       <title>Network Drivers</title>
 528
 529       <para revision="306660" contrib="sponsor"
 530         sponsor="&chelsio;">The &man.cxgbe.4; has been updated to
 531         provide support for Virtual Function devices
 532         (<acronym>VFs</acronym>) on Chelsio T4 and T5 adapters.</para>
 533
 534       <para revision="306661" contrib="sponsor"
 535         sponsor="&chelsio;">TCP connections using the TCP Offload
 536         Engine (<acronym>TOE</acronym>) on Chelsio T4+ adapters can
 537         now perform zero-copy sends via
 538         <function>aio_write()</function>.</para>
 539
 540       <para revision="306664" contrib="sponsor"
 541         sponsor="&chelsio;">The &man.cxgbev.4; has been added,
 542         providing support for Virtual Function devices
 543         (<acronym>VFs</acronym>) on Chelsio T4 and T5 adapters.</para>
 544
 545       <para revision="309377" contrib="sponsor"
 546         sponsor="&broadcom;">The &man.bnxt.4; driver has been added,
 547         providing support for Broadcom&reg; NetXtreme-C&trade; and
 548         NetXtreme-E&trade; devices.</para>
 549
 550       <para revision="309560" contrib="sponsor"
 551         sponsor="&chelsio;">The &man.cxgbe.4; driver now supports
 552         devices using T6-based adapters which support 10, 25, 40, and
 553         100 Gbps.</para>
 554
 555       <para revision="309560" contrib="sponsor"
 556         sponsor="&chelsio;">The &man.cxgbe.4; has been updated to
 557         provide support for Virtual Function devices
 558         (<acronym>VFs</acronym>) on Chelsio T6 adapters.</para>
 559
 560       <para revision="309560" contrib="sponsor"
 561         sponsor="&chelsio;">The &man.cxgbev.4; has been updated to
 562         provide support for Virtual Function devices
 563         (<acronym>VFs</acronym>) on Chelsio T6 adapters.</para>
 564
 565       <para revision="310852" contrib="sponsor"
 566         sponsor="&netgate;">The &man.miibus.4; driver has been updated
 567         to support Microchip/Micrel KSZ9031 Gigabit ethernet
 568         cards.</para>
 569
 570       <para revision="311506" contrib="sponsor"
 571         sponsor="&chelsio;">The &man.cxgbe.4; driver has been updated
 572         to firmware version 1.16.26.0 for T4, T5, and T6 cards.</para>
 573
 574       <para revision="312358">The &man.alc.4; driver has been updated
 575         to provide support for Atheros&reg; Killer&nbsp;E2400&trade;
 576         Gigabit ethernet cards.</para>
 577
 578       <para revision="314005" contrib="sponsor" sponsor="&ms;">The
 579         &man.alc.4; driver has been updated to provide support for
 580         Atheros&reg; Killer&nbsp;E2500&trade; Gigabit ethernet
 581         cards.</para>
 582
 583       <para revision="315330" contrib="sponsor"
 584         sponsor="&netgate;">The &man.etherswitch.4; driver has been
 585         updated to support RTL8366RB and RTL8366SR cards.</para>
 586
 587       <para revision="317116">The &man.qlnxe.4; driver has been added,
 588         providing support for Cavium&reg; Qlogic&trade; 45000 Series
 589         adapters.</para>
 590
 591       <para revision="317182">The &man.qlxgbe.4; firmware has been
 592         updated to version 5.4.64.</para>
 593
 594       <para revision="318357" contrib="sponsor"
 595         sponsor="&intelcorp;">The &man.ixl.4; driver has been updated
 596         to version 1.7.12-k.</para>
 597     </sect2>
 598   </sect1>
 599
 600   <sect1 xml:id="hardware">
 601     <title>Hardware Support</title>
 602
 603     <para>This section covers general hardware support for physical
 604       machines, hypervisors, and virtualization environments, as well
 605       as hardware changes and updates that do not otherwise fit in
 606       other sections of this document.</para>
 607
 608     <sect2 xml:id="hardware-support">
 609       <title>Hardware Support</title>
 610
 611       <para revision="307576">The &man.atkbdc.4; driver has been
 612         updated to provide support for Elantech&reg; trackpads.  To
 613         enable hardware support, add
 614         <literal>hw.psm.elantech_support=1</literal> to
 615         &man.loader.conf.5;.</para>
 616     </sect2>
 617
 618     <sect2 xml:id="hardware-virtualization">
 619       <title>Virtualization Support</title>
 620
 621       <para revision="306471" contrib="sponsor"
 622         sponsor="&chelsio;"><acronym>PCI</acronym> passthrough with
 623         &man.bhyve.4; supports more dynamic configurations permitting
 624         devices to be marked for passthrough or host use at
 625         runtime.</para>
 626
 627       <para revision="306520" contrib="sponsor"
 628         sponsor="&chelsio;"><acronym>PCI</acronym> passthrough with
 629         &man.bhyve.4; resets functions via <acronym>FLR</acronym> when
 630         a virtual machine is started and stopped.</para>
 631     </sect2>
 632
 633     <sect2 xml:id="hardware-arm">
 634       <title>ARM Support</title>
 635
 636       <para revision="305436">Support for the Allwinner A13 board has
 637         been added.</para>
 638     </sect2>
 639   </sect1>
 640
 641   <sect1 xml:id="storage">
 642     <title>Storage</title>
 643
 644     <para>This section covers changes and additions to file systems
 645       and other storage subsystems, both local and networked.</para>
 646
 647     <sect2 xml:id="storage-general">
 648       <title>General Storage</title>
 649
 650       <para>&nbsp;</para>
 651     </sect2>
 652
 653     <sect2 xml:id="storage-net">
 654       <title>Networked Storage</title>
 655
 656       <para>&nbsp;</para>
 657     </sect2>
 658
 659     <sect2 xml:id="storage-zfs">
 660       <title>ZFS</title>
 661
 662       <para>&nbsp;</para>
 663     </sect2>
 664
 665     <sect2 xml:id="storage-geom">
 666       <title><literal>geom(4)</literal></title>
 667
 668       <para>&nbsp;</para>
 669     </sect2>
 670   </sect1>
 671
 672   <sect1 xml:id="boot">
 673     <title>Boot Loader Changes</title>
 674
 675     <para>This section covers the boot loader, boot menu, and other
 676       boot-related changes.</para>
 677
 678     <sect2 xml:id="boot-loader">
 679       <title>Boot Loader Changes</title>
 680
 681       <para revision="307632" contrib="sponsor" sponsor="&gandi;">The
 682         <acronym>EFI</acronym> loader has been updated to support
 683         <acronym>TFTPFS</acronym>, providing netboot support without
 684         requiring an <acronym>NFS</acronym> server.</para>
 685     </sect2>
 686
 687     <sect2 xml:id="boot-menu">
 688       <title>Boot Menu Changes</title>
 689
 690       <para>&nbsp;</para>
 691     </sect2>
 692   </sect1>
 693
 694   <sect1 xml:id="network">
 695     <title>Networking</title>
 696
 697     <para>This section describes changes that affect networking in
 698       &os;.</para>
 699
 700     <sect2 xml:id="network-general">
 701       <title>General Network Changes</title>
 702
 703       <para revision="311681" contrib="sponsor" sponsor="&yandex;">The
 704         network stack has been updated to include
 705         <function>ip6_tryforward()</function>, providing performance
 706         benefits as result of a reduced number of checks.</para>
 707
 708       <para revision="313523" contrib="sponsor"
 709         sponsor="&dellemc;">The network stack has been modified to fix
 710         incorrect or invalid <acronym>IP</acronym> addresses if
 711         multiple threads emit a <acronym>UDP</acronym>
 712         <literal>log_in_vain</literal> message concurrently.</para>
 713
 714       <para revision="317386" contrib="sponsor"
 715         sponsor="&multiplay;">The <acronym>TCP</acronym> stack has
 716         been changed to use the estimated <acronym>RTT</acronym>
 717         instead of timestamps for receive buffer auto resizing.</para>
 718     </sect2>
 719
 720     <sect2 xml:id="network-protocols">
 721       <title>Network Protocols</title>
 722
 723       <para revision="309337" contrib="sponsor"
 724         sponsor="&dellemc;">Support for <acronym>GARP</acronym>
 725         (gratuitous <acronym>ARP</acronym>) retransmit has been added.
 726         A new &man.sysctl.8;,
 727         <literal>net.link.ether.inet.garp_rexmit_count</literal>, has
 728         been added, which sets the maximum number of retransmissions
 729         when set to a non-zero value.</para>
 730
 731       <para revision="315514" contrib="sponsor"
 732         sponsor="&yandex;">Support for the
 733         <literal>UDP_ENCAP_ESPINUDP_NON_IKE</literal> encapsulation
 734         type has been removed.</para>
 735     </sect2>
 736   </sect1>
 737
 738   <sect1 xml:id="ports">
 739     <title>Ports Collection and Package Infrastructure</title>
 740
 741     <para>This section covers changes to the &os;&nbsp;Ports
 742       Collection, package infrastructure, and package maintenance and
 743       installation tools.</para>
 744
 745     <sect2 xml:id="ports-infrastructure">
 746       <title>Infrastructure Changes</title>
 747
 748       <para>&nbsp;</para>
 749     </sect2>
 750
 751     <sect2 xml:id="ports-packages ">
 752       <title>Packaging Changes</title>
 753
 754       <para>&nbsp;</para>
 755     </sect2>
 756   </sect1>
 757
 758   <sect1 xml:id="doc">
 759     <title>Documentation</title>
 760
 761     <para>This section covers changes to the &os;&nbsp;Documentation
 762       Project sources and toolchain.</para>
 763
 764     <sect2 xml:id="doc-sources">
 765       <title>Documentation Source Changes</title>
 766
 767       <para>&nbsp;</para>
 768     </sect2>
 769
 770     <sect2 xml:id="doc-toolchain">
 771       <title>Documentation Toolchain Changes</title>
 772
 773       <para>&nbsp;</para>
 774     </sect2>
 775   </sect1>
 776
 777   <sect1 xml:id="releng">
 778     <title>Release Engineering and Integration</title>
 779
 780     <para>This section convers changes that are specific to the
 781       &os;&nbsp;Release Engineering processes.</para>
 782
 783     <sect2 xml:id="releng-changes">
 784       <title>Integration Changes</title>
 785
 786       <para>&nbsp;</para>
 787     </sect2>
 788   </sect1>
 789 </article>