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

Use machdep.guessed_bootdev to guess the boot device.

Unbreak "update" script, by doing a mkdir -p of the relevant
directories when writing to disk.

Use the (yet to be committed) sysctl variable kern.bootdevname
to derive the device name, fallback to /dev/fd0 if kern.bootdevname
is unset or not available.

The magic for autodetecting the boot media does not work anymore
on STABLE or CURRENT. Put the explicit name for the floppy.

Add a missing 'fi' from an if statement

Move mfs-related files to a new location