Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

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

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Fix warnings and set WARNS to 6.

MFC after: 1 week

Eliminate warnings by adding headers.

Fix the path to aac_ioctl.h in the comment and style includes.

MFC after: 1 week

Fix include: aac_ioctl.h was moved from sys/dev/aac/ to sys/sys.

PR: misc/88549
Submitted by: Sokolov Alexey
MFC after: 1 week

Add a simple tool for checking the queue stats in the aac(4) driver. The
ioctl interface for this has been here for years, so it might as well get
used.