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

bc: sync with OpenBSD

tty.c Rev. 1.3
Avoid unintended problems with operator precedence when doing an
assignment and comparison.

bc.1, Rev. 1.31, 1.32
'.Ql Quit' -> '.Ql quit' because only the lowercase command is valid.
Clarify sentence about `quit` in BUGS section.

extern.h, Rev. 1.12
whitespace

bc.y, Rev. 1.47
Prefer setvbuf() to setlinebuf() for portability

Obtained from: OpenBSD
MFC after: 2 weeks

Sync with OpenBSD.

MFC after: 2 weeks

Document -q and --quiet as discouraged compatibility option.

Suggested by: eadler
MFC after: 2 weeks

Remove mention of the compatibility option 'q', which is
intentionally undocumented and its only purpose is that
we do not bail out when used as a drop-in replacement of
a different implementation.

PR: docs/184550
MFC after: 2 weeks

Remove extra sentence, a leftover from r202845.

- Remove --debug option and intentionally undocument -d, which is only
kept for compatibility with 4.4BSD behavior.
- Sync SYNOPSIS with usage().
- Use an alternative way to represent short and long options which have
same semantics.

Reviewed by: gabor

Replace GNU bc/dc with BSDL versions ported from OpenBSD. They have a good
compatibility level with the GNU counterparts and have shown to be mature
enough. For now, the GNU versions aren't removed from the tree, just detached
from the build.

Sponsored by: Google Summer of Code 2008
Portbuild run by: erwin
Approved by: delphij