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

o Rework ARMv7 events list using aliases - same way as we have for arm64.
o Extend it with Cortex A9-specific events.

Add ARMv7 performance monitoring counters.

Differential Revision: https://reviews.freebsd.org/D1687
Reviewed by: rpaulo
Sponsored by: DARPA, AFRL