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

libc: do not include <sys/types.h> where <sys/param.h> was already included

According to style(9):
> normally, include <sys/types.h> OR <sys/param.h>, but not both.
(<sys/param.h> already includes <sys/types.h> when LOCORE is not defined).

libc: replace 0 with NULL for pointers.

While here also cleanup some surrounding code; particularly
drop some malloc() casts.

Found with devel/coccinelle.

Reviewed by: bde (previous version - all new bugs are mine)

ANSIfy b64_pton

Fix b64_pton output buffer overrun test for exact-sized buffer

b64_pton would sometimes erroneously fail to decode a base64 string into
a precisely sized buffer. The overflow check was a little too greedy.

Reported by: Ted Unangst on freebsd-hackers@
Reviewed by: loos, trasz
Obtained from: OpenBSD
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D1218

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

Add unsigned char cast to ctype macros arg

$Id$ -> $FreeBSD$

Update the resolver parts to bind-8.1.2 level. I have not touched the
getXXXXbyYYYY() interfaces yet.

Obtained from: diff relative to bind-8.1.2 sources

Here goes.. Bring the 4.9.5-P1 resolver into -current. This has the
DNSSEC stuff, among other things. There are also some renamed functions,
I've left out the res_stubs.c from this commit in case cvs bombs out..