MFC r271958:

Permit use of "no" as specification of a Norwegian keymap file.
Only "keymap=NO" (the default in defaults/rc.conf) or "keymap="
(an empty value) will prevent loading of a keymap file.

Approved by:	re (gjb)
Document r271880, serial and null console support added to UEFI
boot loader.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Document r271943, Latest/pkg.txz symlink included on the DVD to
make bootstrapping pkg(8) easier.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Document r271947, OpenPAM updated to Ourouparia (20140912).

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
MFC r272025:

Fix thinko that, with two map entries like shown below, in that order,
made autofs mix them up: the second one wasn't visible in ls(1) output,
and trying to access it would trigger mount for the first one.

foobar          host:/foobar
foo             host:/foo

Approved by:	re (gjb)
Sponsored by:	The FreeBSD Foundation
MFC r272037:

Fix thinko that, with two map entries like shown below, in that order,
made automountd(8) mix them up: trying to access the second one would
trigger mount for the first one.

foo             host:/foo
foobar          host:/foobar

PR:		193584
Approved by:	re (gjb)
Sponsored by:	The FreeBSD Foundation
MFC r271258:

Make mount_smbfs(8) preserve the "automounted" mount flag.

The issue here is that we have to pass this flag as a string,
in iov, because it doesn't fit in mntflags, which is an int.

Approved by:	re (gjb)
Sponsored by:	The FreeBSD Foundation
MFC r271259:

Make it possible to use empty user name ("-U ''") for mount_smbfs(8).
It's just like "-U guest", except that it actually works, at least
with Samba 4, which seems to return authentication failure for "-U guest".

Approved by:	re (gjb)
Sponsored by:	The FreeBSD Foundation
MFC r271493,271688,271689,271696,271854:

Import HyperV Key-Value Pair (KVP) driver and daemon code by Microsoft,
many thanks for their continued support of FreeBSD.

While I'm there, also implement a new build knob, WITHOUT_HYPERV to
disable building and installing of the HyperV utilities when necessary.

The HyperV utilities are only built for i386 and amd64 targets.

Approved by:	re (gjb)
Regen.

This is a direct commit to stable/10 instead of a MFC of
r271494.

Approved by:	re (gjb)
MFC r271534: MFV r271517:

In zil_claim, don't issue warning if we get EBUSY (inconsistent) when
opening an objset, instead, ignore it silently.

Illumos issue:

    5140 message about "%recv could not be opened" is printed when
         booting after crash

Approved by:	re (gjb)
MFC r271536: MFV r271518:

Correctly report hole at end of file.

When asked to find a hole, the DMU sees that there are no holes in the
object, and returns ESRCH.  The ZPL interprets this as "no holes before
the end of the file", and therefore inserts the "virtual hole" at the
end of the file.  Because DMU and ZPL have different ideas of where the
end of an object/file is, we will end up returning the end of file,
which is generally larger, instead of returning the end of object.

The fix is to handle the "virtual hole" in the DMU. If no hole is found,
the DMU will return a hole at the end of the file, rather than an error.

Illumos issue:
    5139 SEEK_HOLE failed to report a hole at end of file

Approved by:	re (gjb)
MFC r271227: MFV r271225:

Iterate through all the children instead of returning error when we hit
the first error.  This makes the error message give more information
rather than just the first device that causes problem.

Illumos issue:
    5118 When verifying or creating a storage pool, error messages only
       show one device

Approved by:	re (gjb)