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

grep: change some int types.

Change several int variables to size_t, ssize_t, or ptrdiff_t.
This should fix the bug described in CVE-2012-5667 when an input
line is so long that its length cannot be stored in an int
variable.

This is based on NetBSD's revision which says:

This change to NetBSD's version of GNU grep 2.5.1 (licenced under
GPLv2) was made without direct reference to any code licenced
under GPLv3.

Obtained from: NetBSD
MFC after: 3 days

Fix dfa multibyte character class matching when -i is used (RH bug #123363).

Obtained from: Fedora (Tim Waugh)

Remove mb-caching hack.

Obtained from: Fedora (Tim Waugh)

Fix bug causing `[' to be wrongly included in character class expressions
in some multibyte locales (Red Hat bug #108484).

Obtained from: Fedora (Tim Waugh)

Make grep run much (~10x) faster in multibyte locales by caching the wide
character representation of input data across calls to dfaexec(), and by
caching the lengths of character across calls to check_multibyte_string().

Obtained from: Fedora (Tim Waugh)

Improve case-insensitive matching in multibyte locales.

Obtained from: Isamu Hasegawa (IBM) via Fedora

Use hard_locale() to check whether collating order is "hard" regardless
of whether NLS is enabled.

Merge local changes.

Merge conflicts, upgrade

1) Remove files no longer needed.
2) Switch back to regex.h

Merge FreeBSD changes into 2.4d.

FreeBSD changes OBE'ed by 2.4d:
* rev 1.5 - use collate for alpha character ranges.

Merge FreeBSD chagnes into GNU grep 2.4.

Merge FreeBSD changes into 2.3:
* rev 1.5 - use collate for alpha character ranges
* rev 1.3 - use -lgnuregex

Submitted by: ru

Back out the botched attempt to update to gnu grep 2.3 (lots of history
was lost). Restore original version to try and avoid breaking the build
while David O'brien does a proper set of imports and merges.

Requested by: obrien