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

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Rewrite longjmp() and _longjmp() to directly restore the saved frame,
instead of unwinding the call stack. This makes them usable to switch
stacks, e.g. for libc_r.
Do not save the frame pointer in setjmp() and _setjmp(), it is not needed
any more.
Rename _longjmp() to ___longjmp(), with a weak alias to _longjmp(), like
the other architectures did.

Use __FBSDID.

Add .register directives for gcc3.
Adapt to jmpbuf no longer being a ucontext_t.
Restore the context "by hand" in longjmp and call sigprocmask, instead
of just using sigreturn.

Add more libc stuff.

Obtained from: netbsd