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

Fix overlinking again after recent ntp updates
Fix building WITHOUT_OPENSSL

MFV ntp 4.2.8p1 (r258945, r275970, r276091, r276092, r276093, r278284)

Thanks to roberto for providing pointers to wedge this into HEAD.

Approved by: roberto

Convert usr.sbin to LIBADD
Reduce overlinking

Backout 274170 it breaks for mips

sntp does not depend on libm

We install the tool, so why not the man page?

MFC after: 3 days

Update the various files to sync with vendor import of 4.2.4p5.
sntp includes a copy of libopts in itself in vendor code, rewrite the
Makefile to compile and use only one copy. It is an internal library, not
installed.

MFC after: 2 weeks

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

For variables that are only checked with defined(), don't provide
any fake value.

Add missing Makefile from previous commit.