DEBUG_LOCKS no longer modifies 'struct vnode', nor does fstat(1) use it.
fstat(1) now uses libprocstat(9).  There is no userland impact to using this.

MFC after:	3 days
Fix ASCQ for "Logical unit not ready, manual intervention required" error.
Build plockstat if WITH_PLOCKSTAT is defined.
Remove settings for pkg_* scripts which are no longer present.

MFC after:	1 week
vm_map_pmap_enter() and pmap_enter_object() are currently not aware of
the wired attribute of the mapping.  As result, some pmap
implementations clear the wired state of the page table entries, which
breaks invariants and allows the entries to be lost.  Avoid calling
vm_map_pmap_enter() for the MADV_WILLNEED on the wired entry, the
pages must be already mapped.

Noted and reviewed by:	alc
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
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
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Note KBI breakage with DEBUG_LOCKS.

It specifically modifies struct lock, which many other structures embed.

Noted by:	kib
MFC after:	3 days
X-MFC-with:	r272032
When reporting some major UNIT ATTENTION condition, like POWER ON OCCURRED
or I_T NEXUS LOSS, clear all minor UAs for the LUN, redundant in this case.

All SAM specifications tell that target MAY do it, but libiscsi initiator
seems require it to be done, terminating connection with error if some more
UAs happen to be reported during iSCSI connection.

MFC after:	3 days
Merge remote-tracking branch 'freebsd/master' into hardened/current/segvguard