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

MFV r301238:

ntp 4.2.8p8.

Security: CVE-2016-4957, CVE-2016-4953, CVE-2016-4954
Security: CVE-2016-4955, CVE-2016-4956
Security: FreeBSD-SA-16:24.ntp
With hat: so

Vendor import of ntp-4.2.8p8.