Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Fix typos; add FreeBSD Id where missing.

This commit was generated by cvs2svn to compensate for changes in r91586,
which included commits to RCS files with non-trunk default branches.

Import of NetBSD's (x)lint, snapshotted at 2002-3-3.

Jochen Pohl's lint(1) from NetBSD. Yet another import.

This is just a vendor import by now. I'll wait until i'll get the
imported files back via CTM before applying the FreeBSD patches.
Don't use it yet.

Submitted by: Jochen Pohl <jpo.drs@sni.de>
Obtained from: (NetBSD -- this version is directly from Jochen)