MFStable-10 r259301

MFStable-10 r259301

  MFC r256657,r257018,r257347,r257423,r257729,r257767,
      r257933,r258609,r258614,r258668,r258673,r258855

  Pull in some minor bugfixes and functionality enhancements
  from CURRENT. These are candidates to be moved to 10.0-release.

  r258855
  mdoc: quote string properly.

  r258673
  Don't create an initial value for the host filesystem of "/".

  r258668
  Allow bhyve and bhyveload to attach to tty devices.

  r258614
  The 22-bit Data Byte Count (DBC) field of a Physical Region Descriptor was
  being read as a 32-bit quantity by the bhyve AHCI driver.

  r258609
  Fix discrepancy between the IOAPIC ID advertised by firmware tables and the
  actual value read by the guest.

  r257933
  Route the legacy timer interrupt (IRQ0) to pin 2 of the IOAPIC.

  r257767
  Fix an off-by-one error when iterating over the emulated PCI BARs.

  r257729
  Add the VM name to the process name with setproctitle().

  r257423
  Make the virtual ioapic available unconditionally in a bhyve virtual machine.

  r257347
  Update copyright to include the author of the LPC bridge emulation code.

  hand-merge r257018
  Tidy usage messages for bhyve and bhyveload.

  r256657
  Add an option to bhyveload(8) that allows setting a loader environment variable
  from the command line.

Approved by:	re@ (gjb)

git-svn-id: svn://svn.freebsd.org/base/releng/10.0@259496 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f