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 (-Wunused)
- Bump WARNS to 6

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

Add a simple regression test that creates and tears down route sockets,
and confirms that only SOCK_RAW works with socket(), and nothing works
with socketpair().