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

Only add -fPIC to CFLAGS and -Wl,-znocombreloc to LDFLAGS on x86, they
shouldn't be used on arm.

Move reloc.c to the top level Makefile as it has become generic.

Add build support for i386 loader.efi

Kernel changes are required for this to be useful but this will allow
others to experiment.

Differential Revision: https://reviews.freebsd.org/D2276