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 convenience macros for bus_space usage that doesn't require specification
of bus tag+handle.

Instead of
bus_space_write_1(sc->tag, sc->handle, ...)
this macros offer
bus_write_1(sc->resource, ...)

The name+argument transformation is constant and the the macros are
generated (by hand) by the script in tools/bus_macro.sh.