MFC: r272243

  Add missing library dependencies.
MFC: r272245

  Remove duplicate prog.
MFC: r272248

  - Cleanups pc98 code.
  - Remove unworked formats.
MFC r272059:
Remake Linux' SOUND_MIXER_INFO IOCTL as a wrapper around new FreeBSD's one.

Submitted by:	Dmitry Luhtionov <dmitryluhtionov@gmail.com>
Fix build breakage of r274056.
[SA-14:25] Fix kernel stack disclosure in setlogin(2) / getlogin(2).
[SA-14:26] Fix remote command execution in ftp(1).
[EN-14:12] Fix NFSv4 and ZFS cache consistency issue.

Approved by:	so (des)
MFC r271992

  Reflect the chanages in sleepqueue.h and subr_sleepqueue.c
  - Priority argument is introduced to sleepq_*wait* in r177085
  - sleepq_calc_signal_retval is removed from implementation
  - sleepq_catch_signals is internal now

MFC r272475

  - Bump .Dd

Approved by:  kevlo
Bump __FreeBSD_version after SA-14:23, SA-14:24,
SA-14:25.

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