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 can now be
 163         built 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="308720" contrib="sponsor" sponsor="&gandi;">The
 183         &man.cron.8; utility has been updated to add support for
 184         including files within <filename
 185           class="directory">/etc/cron.d</filename> and <filename
 186           class="directory">/usr/local/etc/cron.d</filename> by
 187         default.</para>
 188
 189       <para revision="308721" contrib="sponsor" sponsor="&gandi;">The
 190         &man.syslogd.8; utility has been updated to add the
 191         <literal>include</literal> keyword which allows specifying
 192         a directory containing configuration files to be included in
 193         addition to &man.syslog.conf.5;.  The default
 194         &man.syslog.conf.5; has been updated to include <filename
 195           class="directory">/etc/syslog.d</filename> and <filename
 196           class="directory">/usr/local/etc/syslog.d</filename> by
 197         default.</para>
 198
 199       <para revision="308914">The &man.zfsbootcfg.8; utility has been
 200         added, providing one-time &man.boot.config.5;-style options
 201         for &man.zfsboot.8;.</para>
 202
 203       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 204         &man.setkey.8; utility has been modified to show the runtime
 205         <acronym>NAT-T</acronym> configuration.  The
 206         <literal>-g</literal> and <literal>-t</literal> flags have
 207         been added, which list only global and virtual policies,
 208         respectively, when used with the <literal>-D</literal> and
 209         <literal>-P</literal> flags.</para>
 210
 211       <para revision="316098" contrib="sponsor"
 212         sponsor="&dellemc;">The &man.getaddrinfo.1; utility has been
 213         added, ported from NetBSD.</para>
 214
 215       <para revision="316944" contrib="sponsor"
 216         sponsor="&multiplay;">The &man.jail.8; utility has been
 217         updated to allow explicitly-assigned <acronym>IPv4</acronym>
 218         and <acronym>IPv6</acronym> addresses to be used within
 219         a jail.</para>
 220
 221       <para revision="317855">The &man.daemon.8; utility has been
 222         updated to allow redirecting &man.stdout.4; and &man.stderr.4;
 223         output to &man.syslog.3; or to a file.</para>
 224     </sect2>
 225
 226     <sect2 xml:id="userland-contrib">
 227       <title>Contributed Software</title>
 228
 229       <para revision="307729">&man.unbound.8; has been updated to
 230         version 1.5.10.</para>
 231
 232       <para revision="309511"><application>Subversion</application>
 233         has been updated to version 1.9.5.</para>
 234
 235       <para revision="309847">&man.file.1; has been updated to version
 236         5.29.</para>
 237
 238       <para revision="310490">The &man.amd.8; utility has been updated
 239         to version 6.2.</para>
 240
 241       <para revision="312336">The <acronym>CLDR</acronym> locales have
 242         been updated to version 30.0.3.  The unicode locales have been
 243         updated to version 9.0.0.</para>
 244
 245       <para revision="312517">&man.xz.1; has been updated to version
 246         5.2.3.</para>
 247
 248       <para revision="313537">&man.tcpdump.1; has been updated to
 249         version 4.9.0.</para>
 250
 251       <para revision="313795">&man.zlib.3; has been updated to version
 252         1.2.11.</para>
 253
 254       <para revision="313980"><application>openresolv</application>
 255         has been updated to version 3.9.0.</para>
 256
 257       <para revision="313680">The NetBSD test suite has been updated
 258         to the 01.11.2017_23.20 snapshot.</para>
 259
 260       <para revision="314278"><literal>libucl</literal> has been
 261         updated to version 20170219.</para>
 262
 263       <para revision="315432">&man.libarchive.3; has been updated to
 264         version 3.3.1.</para>
 265
 266       <para revision="315995">&man.dma.8; has been updated to the
 267         2017-02-10 snapshot.</para>
 268
 269       <para revision="316068">&man.ntpd.8; has been updated to version
 270         4.2.8p10.</para>
 271
 272       <para revision="316303"><application>ACPICA</application> has
 273         been updated to version 20170303.</para>
 274
 275       <para revision="316349">Timezone data files have been updated to
 276         version 2017b.</para>
 277
 278       <para revision="316420">&man.mandoc.1; has been updated to
 279         version 1.14.</para>
 280
 281       <para revision="316423"><application>Clang</application> has
 282         been updated to version 4.0.0.</para>
 283
 284       <para revision="316423"><application>LLVM</application> has
 285         been updated to version 4.0.0.</para>
 286
 287       <para revision="316423"><application>LLD</application> has
 288         been updated to version 4.0.0.</para>
 289
 290       <para revision="316423"><application>LLDB</application> has
 291         been updated to version 4.0.0.</para>
 292
 293       <para revision="316423"><application>compiler-rt</application>
 294         has been updated to version 4.0.0.</para>
 295
 296       <para revision="316423"><application>libc++</application> has
 297         been updated to version 4.0.0.</para>
 298
 299       <para revision="316957">&man.tcsh.1; has been updated to version
 300         6.20.00.</para>
 301
 302       <para revision="318239" contrib="sponsor"
 303         sponsor="&ff;">&man.blacklistd.8; has been updated to the
 304         20170503 snapshot.</para>
 305
 306       <para revision="318402" contrib="sponsor"
 307         sponsor="&ff;">&man.blacklistd.8; support for
 308         <application>OpenSSH</application> has been refined to adjust
 309         notification points to catch all authentication failures
 310         rather than only those caused by invalid login
 311         usernames.</para>
 312     </sect2>
 313
 314     <sect2 xml:id="userland-installer">
 315       <title>Installation and Configuration Tools</title>
 316
 317       <para revision="311686">The &man.bsdinstall.8; installer has
 318         been updated to include support for hidden wireless networks
 319         when configuring the &man.wlan.4; interface.</para>
 320     </sect2>
 321
 322     <sect2 xml:id="userland-rc">
 323       <title><filename class="directory">/etc/rc.d</filename>
 324         Scripts</title>
 325
 326       <para revision="310009" contrib="sponsor"
 327         sponsor="&fisglobal;">The <literal>jail_confwarn</literal>
 328         &man.rc.conf.5; entry has been added, which suppresses warning
 329         about obsolete per-&man.jail.8; configurations.</para>
 330     </sect2>
 331
 332     <sect2 xml:id="userland-periodic">
 333       <title><filename class="directory">/etc/periodic</filename>
 334         Scripts</title>
 335
 336       <para revision="317373">The default &man.periodic.conf.5; has
 337         been updated to include the
 338         <literal>anticongestion_sleeptime</literal> option,
 339         consolidating random sleeps in &man.periodic.8; scripts and
 340         replacing the <literal>daily_ntpd_avoid_congestion</literal>
 341         option.  The default value is 3600 seconds.</para>
 342
 343       <para revision="317857">The <filename>410.status-mfi</filename>
 344         &man.periodic.8; script has been added to monitor the status
 345         of &man.mfi.4; volumes.</para>
 346     </sect2>
 347
 348     <sect2 xml:id="userland-libraries">
 349       <title>Runtime Libraries and API</title>
 350
 351       <para revision="316039">The &man.kvm.close.3; function has been
 352         updated to return the accumulated error from previous
 353         &man.close.2; calls.</para>
 354
 355       <para revision="317618" contrib="sponsor"
 356         sponsor="&dellemc;">The <function>clock_nanosleep()</function>
 357         system call has been added.  The
 358         <function>nanosleep()</function> system call is now a wrapper
 359         around <function>clock_nanosleep()</function>.</para>
 360     </sect2>
 361
 362     <sect2 xml:id="userland-abi">
 363       <title>ABI Compatibility</title>
 364
 365       <para revision="309258">The type <literal>max_align_t</literal>
 366         is now defined for C11 compliance.</para>
 367
 368       <para revision="315274" contrib="sponsor"
 369         sponsor="&dellemc;">The
 370         <function>sem_clockwait_np()</function> library function has
 371         been added, which allows the caller to specify the reference
 372         clock and choose between absolute and relative mode.</para>
 373
 374       <para revision="315282">The <application>clang</application>
 375         <literal>nullability</literal> attribute has been added to the
 376         <literal>C</literal> library headers.</para>
 377     </sect2>
 378   </sect1>
 379
 380   <sect1 xml:id="kernel">
 381     <title>Kernel</title>
 382
 383     <para>This section covers changes to kernel configurations, system
 384       tuning, and system control parameters that are not otherwise
 385       categorized.</para>
 386
 387     <sect2 xml:id="kernel-bugfix">
 388       <title>Kernel Bug Fixes</title>
 389
 390       <para revision="317434">The &man.ipf.4; packet filter has been
 391         updated to prevent <literal>keep state</literal> from
 392         incorrectly implying <literal>keep frags</literal>, matching
 393         the behavior documented in &man.ipf.5;.</para>
 394     </sect2>
 395
 396     <sect2 xml:id="kernel-config">
 397       <title>Kernel Configuration</title>
 398
 399       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 400         <literal>IPSEC_NAT_T</literal> kernel configuration option has
 401         been removed.  Support for <acronym>NAT-T</acronym> is now
 402         enabled by default.</para>
 403
 404       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 405         <literal>IPSEC_FILTERTUNNEL</literal> kernel option has been
 406         removed, which was deprecated by the
 407         <literal>net.inet.ipsec.filtertunnel</literal> sysctl.</para>
 408     </sect2>
 409
 410     <sect2 xml:id="kernel-modules">
 411       <title>Kernel Modules</title>
 412
 413       <para revision="307144">&man.cloudabi.4; has been updated to
 414         allow running 32-bit binaries within 64-bit userland
 415         environments when the kernel configuration file has the
 416         <literal>COMPAT_CLOUDABI32</literal> option present.</para>
 417
 418       <para revision="315514" contrib="sponsor" sponsor="&yandex;">The
 419         <literal>ipsec</literal> and <literal>tcpmd5</literal> kernel
 420         modules have been added.</para>
 421
 422       <para revision="316274" contrib="sponsor" sponsor="&yandex;">The
 423         &man.ipfw.4; packet filter has been updated to add support for
 424         named dynamic states.</para>
 425
 426       <para revision="316444" contrib="sponsor" sponsor="&yandex;">The
 427         <literal>ipfw_nptv6</literal> kernel module has been added,
 428         implementing Network Prefix Translation for
 429         <acronym>IPv6</acronym> as defined in <acronym>RFC</acronym>
 430         6296.</para>
 431
 432       <para revision="316446" contrib="sponsor" sponsor="&yandex;">The
 433         <literal>ipfw_nat64</literal> kernel module has been added,
 434         implementing stateless and stateful
 435         <acronym>NAT64</acronym>.</para>
 436
 437       <para revision="316660" contrib="sponsor" sponsor="&ff;">The
 438         &man.cfumass.4; device has been added, providing a storage
 439         frontend to <acronym>USB</acronym>
 440         <acronym>OTG</acronym>-capable hardware.</para>
 441
 442       <para revision="317045" contrib="sponsor" sponsor="&yandex;">The
 443         <literal>ipfw_pmod</literal> kernel module has been added,
 444         designed for modifying packets of any protocol.</para>
 445
 446       <note>
 447         <para>At present, only <acronym>TCP</acronym>
 448           <acronym>MSS</acronym> modification is implemented.</para>
 449       </note>
 450     </sect2>
 451
 452     <sect2 xml:id="kernel-sysctl">
 453       <title>System Tuning and Controls</title>
 454
 455       <para revision="315539">The
 456         <literal>vfs.root_mount_always_wait</literal> tunable has been
 457         added, which forces the kernel to wait for root mount holds
 458         even if the root device is already present.</para>
 459
 460       <para revision="316120" contrib="sponsor"
 461         sponsor="&dellemc;">When the system real time clock
 462         (<acronym>RTC</acronym>) is adjusted, such as by
 463         <function>clock_settime()</function>, sleeping threads are now
 464         awakened and absolute sleep times are reevaluated based on the
 465         new value of the RTC.</para>
 466     </sect2>
 467   </sect1>
 468
 469   <sect1 xml:id="drivers">
 470     <title>Devices and Drivers</title>
 471
 472     <para>This section covers changes and additions to devices and
 473       device drivers since &release.prev;.</para>
 474
 475     <sect2 xml:id="drivers-device">
 476       <title>Device Drivers</title>
 477
 478       <para revision="307768">The &man.jedec.ts.4; driver has been
 479         added, providing support for thermal sensors on memory
 480         modules.  The driver currently supports chips that are fully
 481         compliant with the <acronym>JEDEC</acronym>
 482         <acronym>JC</acronym> 42.4 specification.</para>
 483
 484       <para revision="308104">The &man.chromebook.platform.4; driver
 485         has been added, providing support for various Chromebook
 486         models.</para>
 487
 488       <para revision="308942">The &man.bytgpio.4; driver has been
 489         added, providing support for Intel&reg; Bay&nbsp;Trail&trade;
 490         SoC GPIO controllers.</para>
 491
 492       <para revision="312394"><filename>/dev/kmem</filename> no longer
 493         supports access via <function>mmap()</function>.  Consumers
 494         wishing to use <filename>/dev/kmem</filename> must use
 495         <function>read()</function> and
 496         <function>write()</function>.</para>
 497
 498       <para revision="306533" contrib="sponsor"
 499         sponsor="&chelsio;">&man.devctl.8; now supports a &quot;clear
 500         driver&quot; command as a complement to &quot;set
 501         driver&quot;.</para>
 502     </sect2>
 503
 504     <sect2 xml:id="drivers-storage">
 505       <title>Storage Drivers</title>
 506
 507       <para>&nbsp;</para>
 508     </sect2>
 509
 510     <sect2 xml:id="drivers-network">
 511       <title>Network Drivers</title>
 512
 513       <para revision="306660" contrib="sponsor"
 514         sponsor="&chelsio;">The &man.cxgbe.4; has been updated to
 515         provide support for Virtual Function devices
 516         (<acronym>VFs</acronym>) on Chelsio T4 and T5 adapters.</para>
 517
 518       <para revision="306661" contrib="sponsor"
 519         sponsor="&chelsio;">TCP connections using the TCP Offload
 520         Engine (<acronym>TOE</acronym>) on Chelsio T4+ adapters can
 521         now perform zero-copy sends via
 522         <function>aio_write()</function>.</para>
 523
 524       <para revision="306664" contrib="sponsor"
 525         sponsor="&chelsio;">The &man.cxgbev.4; has been added,
 526         providing support for Virtual Function devices
 527         (<acronym>VFs</acronym>) on Chelsio T4 and T5 adapters.</para>
 528
 529       <para revision="309377" contrib="sponsor"
 530         sponsor="&broadcom;">The &man.bnxt.4; driver has been added,
 531         providing support for Broadcom&reg; NetXtreme-C&trade; and
 532         NetXtreme-E&trade; devices.</para>
 533
 534       <para revision="309560" contrib="sponsor"
 535         sponsor="&chelsio;">The &man.cxgbe.4; driver now supports
 536         devices using T6-based adapters which support 10, 25, 40, and
 537         100 Gbps.</para>
 538
 539       <para revision="309560" contrib="sponsor"
 540         sponsor="&chelsio;">The &man.cxgbe.4; has been updated to
 541         provide support for Virtual Function devices
 542         (<acronym>VFs</acronym>) on Chelsio T6 adapters.</para>
 543
 544       <para revision="309560" contrib="sponsor"
 545         sponsor="&chelsio;">The &man.cxgbev.4; has been updated to
 546         provide support for Virtual Function devices
 547         (<acronym>VFs</acronym>) on Chelsio T6 adapters.</para>
 548
 549       <para revision="310852" contrib="sponsor"
 550         sponsor="&netgate;">The &man.miibus.4; driver has been updated
 551         to support Microchip/Micrel KSZ9031 Gigabit ethernet
 552         cards.</para>
 553
 554       <para revision="311506" contrib="sponsor"
 555         sponsor="&chelsio;">The &man.cxgbe.4; driver has been updated
 556         to firmware version 1.16.26.0 for T4, T5, and T6 cards.</para>
 557
 558       <para revision="312358">The &man.alc.4; driver has been updated
 559         to provide support for Atheros&reg; Killer&nbsp;E2400&trade;
 560         Gigabit ethernet cards.</para>
 561
 562       <para revision="314005" contrib="sponsor" sponsor="&ms;">The
 563         &man.alc.4; driver has been updated to provide support for
 564         Atheros&reg; Killer&nbsp;E2500&trade; Gigabit ethernet
 565         cards.</para>
 566
 567       <para revision="315330" contrib="sponsor"
 568         sponsor="&netgate;">The &man.etherswitch.4; driver has been
 569         updated to support RTL8366RB and RTL8366SR cards.</para>
 570
 571       <para revision="317116">The &man.qlnxe.4; driver has been added,
 572         providing support for Cavium&reg; Qlogic&trade; 45000 Series
 573         adapters.</para>
 574
 575       <para revision="317182">The &man.qlxgbe.4; firmware has been
 576         updated to version 5.4.64.</para>
 577
 578       <para revision="318357" contrib="sponsor"
 579         sponsor="&intelcorp;">The &man.ixl.4; driver has been updated
 580         to version 1.7.12-k.</para>
 581     </sect2>
 582   </sect1>
 583
 584   <sect1 xml:id="hardware">
 585     <title>Hardware Support</title>
 586
 587     <para>This section covers general hardware support for physical
 588       machines, hypervisors, and virtualization environments, as well
 589       as hardware changes and updates that do not otherwise fit in
 590       other sections of this document.</para>
 591
 592     <sect2 xml:id="hardware-support">
 593       <title>Hardware Support</title>
 594
 595       <para revision="307576">The &man.atkbdc.4; driver has been
 596         updated to provide support for Elantech&reg; trackpads.  To
 597         enable hardware support, add
 598         <literal>hw.psm.elantech_support=1</literal> to
 599         &man.loader.conf.5;.</para>
 600     </sect2>
 601
 602     <sect2 xml:id="hardware-virtualization">
 603       <title>Virtualization Support</title>
 604
 605       <para>&nbsp;</para>
 606     </sect2>
 607
 608     <sect2 xml:id="hardware-arm">
 609       <title>ARM Support</title>
 610
 611       <para revision="305436">Support for the Allwinner A13 board has
 612         been added.</para>
 613     </sect2>
 614   </sect1>
 615
 616   <sect1 xml:id="storage">
 617     <title>Storage</title>
 618
 619     <para>This section covers changes and additions to file systems
 620       and other storage subsystems, both local and networked.</para>
 621
 622     <sect2 xml:id="storage-general">
 623       <title>General Storage</title>
 624
 625       <para>&nbsp;</para>
 626     </sect2>
 627
 628     <sect2 xml:id="storage-net">
 629       <title>Networked Storage</title>
 630
 631       <para>&nbsp;</para>
 632     </sect2>
 633
 634     <sect2 xml:id="storage-zfs">
 635       <title>ZFS</title>
 636
 637       <para>&nbsp;</para>
 638     </sect2>
 639
 640     <sect2 xml:id="storage-geom">
 641       <title><literal>geom(4)</literal></title>
 642
 643       <para>&nbsp;</para>
 644     </sect2>
 645   </sect1>
 646
 647   <sect1 xml:id="boot">
 648     <title>Boot Loader Changes</title>
 649
 650     <para>This section covers the boot loader, boot menu, and other
 651       boot-related changes.</para>
 652
 653     <sect2 xml:id="boot-loader">
 654       <title>Boot Loader Changes</title>
 655
 656       <para revision="307632" contrib="sponsor" sponsor="&gandi;">The
 657         <acronym>EFI</acronym> loader has been updated to support
 658         <acronym>TFTPFS</acronym>, providing netboot support without
 659         requiring an <acronym>NFS</acronym> server.</para>
 660     </sect2>
 661
 662     <sect2 xml:id="boot-menu">
 663       <title>Boot Menu Changes</title>
 664
 665       <para>&nbsp;</para>
 666     </sect2>
 667   </sect1>
 668
 669   <sect1 xml:id="network">
 670     <title>Networking</title>
 671
 672     <para>This section describes changes that affect networking in
 673       &os;.</para>
 674
 675     <sect2 xml:id="network-general">
 676       <title>General Network Changes</title>
 677
 678       <para revision="311681" contrib="sponsor" sponsor="&yandex;">The
 679         network stack has been updated to include
 680         <function>ip6_tryforward()</function>, providing performance
 681         benefits as result of a reduced number of checks.</para>
 682
 683       <para revision="313523" contrib="sponsor"
 684         sponsor="&dellemc;">The network stack has been modified to fix
 685         incorrect or invalid <acronym>IP</acronym> addresses if
 686         multiple threads emit a <acronym>UDP</acronym>
 687         <literal>log_in_vain</literal> message concurrently.</para>
 688
 689       <para revision="317386" contrib="sponsor"
 690         sponsor="&multiplay;">The <acronym>TCP</acronym> stack has
 691         been changed to use the estimated <acronym>RTT</acronym>
 692         instead of timestamps for receive buffer auto resizing.</para>
 693     </sect2>
 694
 695     <sect2 xml:id="network-protocols">
 696       <title>Network Protocols</title>
 697
 698       <para revision="309337" contrib="sponsor"
 699         sponsor="&dellemc;">Support for <acronym>GARP</acronym>
 700         retransmit has been added.  A new &man.sysctl.8;,
 701         <literal>net.link.ether.inet.garp_rexmit_count</literal>, has
 702         been added, which sets the maximum number of retransmissions
 703         when set to a non-zero value.</para>
 704
 705       <para revision="315514" contrib="sponsor"
 706         sponsor="&yandex;">Support for the
 707         <literal>UDP_ENCAP_ESPINUDP_NON_IKE</literal> encapsulation
 708         type has been removed.</para>
 709     </sect2>
 710   </sect1>
 711
 712   <sect1 xml:id="ports">
 713     <title>Ports Collection and Package Infrastructure</title>
 714
 715     <para>This section covers changes to the &os;&nbsp;Ports
 716       Collection, package infrastructure, and package maintenance and
 717       installation tools.</para>
 718
 719     <sect2 xml:id="ports-infrastructure">
 720       <title>Infrastructure Changes</title>
 721
 722       <para>&nbsp;</para>
 723     </sect2>
 724
 725     <sect2 xml:id="ports-packages ">
 726       <title>Packaging Changes</title>
 727
 728       <para>&nbsp;</para>
 729     </sect2>
 730   </sect1>
 731
 732   <sect1 xml:id="doc">
 733     <title>Documentation</title>
 734
 735     <para>This section covers changes to the &os;&nbsp;Documentation
 736       Project sources and toolchain.</para>
 737
 738     <sect2 xml:id="doc-sources">
 739       <title>Documentation Source Changes</title>
 740
 741       <para>&nbsp;</para>
 742     </sect2>
 743
 744     <sect2 xml:id="doc-toolchain">
 745       <title>Documentation Toolchain Changes</title>
 746
 747       <para>&nbsp;</para>
 748     </sect2>
 749   </sect1>
 750
 751   <sect1 xml:id="releng">
 752     <title>Release Engineering and Integration</title>
 753
 754     <para>This section convers changes that are specific to the
 755       &os;&nbsp;Release Engineering processes.</para>
 756
 757     <sect2 xml:id="releng-changes">
 758       <title>Integration Changes</title>
 759
 760       <para>&nbsp;</para>
 761     </sect2>
 762   </sect1>
 763 </article>