MFC r271351
  Fix a boundary case error in vm_reserv_alloc_contig().
MFC r272305

Fix pkill unit test.
MFC r271424:

  - Add $netif_ipexpand_max to specify the upper limit for the number of
    addresses generated by an address range specification.  The default value
    is 2048.  This can be increased by setting $netif_ipexpand_max in rc.conf.

PR:	186841
MFC r272579:

  Bump .Dd missed in r271424
MFC r272349, r272422 and r272479:
- Fix XHCI driver for devices which have more than 15 physical root HUB
  ports. The current bitmap array was too small to hold more than 16
  bits and would at some point toggle the context size, which then would
  trigger an enumeration fault and cause a fallback to the EHCI
  companion controller, if any.
- Make sure we always set the maximum number of valid contexts.
- Set default cycle state in case of early interrupts.
MFC r272410:
Add new USB ID.

PR:		194091
MFC r272480:
When we fail to get a USB reference we should just return, because
there are no more references held.
MFC: r272398

Make sure to not skip any argument when converting from deprecated
+POS1, -POS2 to -kPOS1,POS2, so that sort +0n gets translated to sort -k1,1n
as it is expected

PR:		193994
Submitted by:	rodrigo
MFC after:	3 days
MFC r272111
fix a panic when passing ifioctl from a netmap file descriptor to
the underlying device. This needs to be merged to 10.1
MFC r271308:
Make ZVOL writes in device mode support IO_SYNC flag.
MFC r271309:
Improve cache control support, including DPO/FUA flags and the mode page.

At this moment it works only for files and ZVOLs in device mode since BIOs
have no respective respective cache control flags (DPO/FUA).
MFC r271311:
Add support for Mode Page Policy (0x87) VPD page.
MFC r271316: Report that DPO and FUA bits are supported after r271311.
MFC r271352: Fix minor buffer overflow reported by Coverity.
MFC r271353: Fix memory leak on error, reported by Coverity.
MFC r271354: Fix couple off-by-one range check errors, reported by Coverity.
MFC r271358: Fix array overrun, reported by Coverity.
MFC r271360: Remove uninitialized and unused variable, reported by Coverity.
MFC r271313: Oops, missed piece of r271311.
MFC r271443: Add support for Extended INQUIRY Data (0x86) VPD page.