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 .Mt to mark up email addresses consistently (final part)

PR: 191174
Submitted by: Franco Fichtner <franco at lastsummer.de>

mdoc: remove superfluous paragraph macros.

Updates for netgraph node manual pages.

Discussed with: glebius
Submitted by: Mamontov Roman <mr.xanto@gmail.com>

Globally replace u_int*_t from (non-contributed) man pages.

The reasoning behind this, is that if we are consistent in our
documentation about the uint*_t stuff, people will be less tempted to
write new code that uses the non-standard types.

I am not going to bump the man page dates, as these changes can be
considered style nits. The meaning of the man pages is unaffected.

MFC after: 1 month

mdoc: consistently spell our email addresses <foo@FreeBSD.org>

Reviewed by: ru

Fix typos and use consistent section names in manual pages:

s/SYSCTLS/SYSCTL VARIABLES/
s/TUNABLES/LOADER TUNABLES/
s/CAVEAT/CAVEATS/
s/DESCIPTION/DESCRIPTION/

Reviewed by: ru
MFC after: 3 days

(Mostly) markup fixes.

Approved by: re (blanket)

- new sentence, new line
- s/freebsd/FreeBSD/

Add a man page for ng_ccatm(4).

Reminded by: brueffer