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

Use NULL instead of 0 for pointers.

realloc will return NULL in case it cannot allocate memory.

MFC after: 2 weeks.

Connect flex 2.5.37 to the build and bump __FreeBSD_version.

Unbreak the test target by re-generating the initial scanner
using an updated flex(1) binary.

Also ignore the changing $FreeBSD$ ID lines when doing the diff.
This needs additional obfuscation, to not upset the svn precommit
hooks :/

Let both yacc and lex generate code that passes -Wold-style-definition.

Both these tools emit code where several functions have no `void'
keyword placed in the arugment list when the function has no arguments.

De-register declarations.

Replace various spelling with FALLTHROUGH which is lint()able

Consistently use FBSDID

Removed duplicate VCS ID tags, as per style(9).

After a proper import we now have both the original RCS tags + our own.
(also now clearer in ``cvs log'' that we are at version 2.5.4)

$Header$ -> $FreeBSD$

Upgrade to version 2.5.4 of flex.

Inspired by: NetBSD/OpenBSD (I can't remember who I saw do it
first, so I'll give them both some inspiration
points. :)

Finish the import and merge in FreeBSD specific changes.

Add a 'bootstrap' target which *must* be run before building the new
version, since the new scanner relies on the current version of flex to
build itself otherwise.

Remove trailing whitespace.

This commit was generated by cvs2svn to compensate for changes in r2258,
which included commits to RCS files with non-trunk default branches.

Flex version 2.4.7 from LBL
Reviewed by: Geoff.