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

- Add descriptions to most of the rc scripts. Those are mostly taken from their
daemon's manpage and probably improved.
- Consistently use "filesystem" not "file system".

Approved by: bapt, brueffer
Differential Revision: D452

Modify the rctl rc script to add multiple rules in a single run.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Make rctl_enable rc variable actually work. To avoid breaking existing
setups that worked before, flip the default to "YES". Most people don't
have /etc/rctl.conf, so they won't be affected in any way.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation

Allow overriding rctl.conf(5) file location for /etc/rc.d/rctl

Reviewed by: trasz
Approved by: bapt (mentor)
MFC after: 1 week

Add startup script, to load rules from /etc/rctl.conf.

Sponsored by: The FreeBSD Foundation
Reviewed by: kib (ealier version)