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

Test for EPROTOTYPE not EPROTONOSUPPORT

- `SOCK_RAW` is the implied supported type parameter for socket(2) per route(4)
- localsw in `sys/kern/uipc_usrreq.c` doesn't have an entry for `SOCK_RAW`, so
the prototype is invalid (this isn't explicitly documented anywhere I could
find)

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

Garbage collect argc/argv and bump WARNS to 6

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

NO_MAN= has been deprecated in favor of MAN= for some time, go ahead
and finish the job. ncurses is now the only Makefile in the tree that
uses it since it wasn't a simple mechanical change, and will be
addressed in a future commit.

o style.Makefile(5): WARNS= -> WARNS?=.

Add simple regression tests that creates UNIX domain sockets using
socket() and socketpair() of SOCK_STREAM and SOCK_DGRAM types. It
also confirms that SOCK_RAW fails.