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

Introduce and use new flag -L to mount for mounting only late filesystems.

Previously, rc.d/mountlate mounted *all* filesystems, causing problems with
background NFS mounts being mounted twice.

PR: conf/137629
Submitted by: eadler (original concept)
Reviewed by: mjg
Approved by: hrs

As previously discussed, add the svn:executable property to all scripts

Don't say we're going to mount filesystems of a certain type unless
there actually are filesystems of that type to mount.

root

The check for errors from the mount command did not work as intended
because another command (echo) is executed between the mount command
and the check.

Reported by: Sergey Baturov <sergey@toor.org.ru>
MFC after: 2 weeks

o Implement the stop_boot subroutine [1]. This subroutine can be used by
scripts in rc.d to stop rc(8) from booting into multi-user mode when
a critical or severe error condition is encountered.

o Modify scripts in etc/rc.d that already implemented this functionality
independently.

o Document it.

[1] - This subroutine was implemented in FreeBSD in rc.d/fsck. I moved it
to rc.subr(8). Our version differs slightly in that it takes an
optional argument to stop the boot even if "autoboot" is not set.

Obtained from: NetBSD
MFC after: 2 weeks

Teach mount(8) about a 'late' keyword, which means the file system should
not be mounted unless the -l flag was specified.

Add an rc script, mountlate, which basically runs 'mount -a -l'. It runs
after DAEMON but before LOGIN.

This is useful for things like loopback mounts, because mountcritremote
runs before mountd / nfsd (since /usr might be a remote file system), so
an attempt to mount a loopback network file system in mountcritremote will
fail.

Also add a progress message to mountcritlocal, for the sake of symmetry
with similar messages in mountcritremote and mountlate.

Reviewed by: freebsd-rc
MFC after: 3 weeks