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

mdoc: improvements to SEE ALSO.

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

First set of xlocale man pages. More to follow...

Approved by: dim (mentor)

Let the armchair generals handle this one.

Document the need for a cast when passing a char to a ctype function.

MFC after: 2 weeks

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Trim cross-references.

mdoc(7) police: tidy up.

From the PR:

1. ctype.h defines digittoint(), isnumber() and ishexnmber(), yet
they are not documented in any of the manpages.

2. The ctype manpage references a non-existent manpage for
digittoint().

3. The isascii() manpage claims it is standards compliant, when
it isn't.

4. isblank() claims it is _not_ standards compliant, when it
is.

Fix by including the appropriate .Nm entries, and with a new digittoint.3
page.

PR: docs/26451
Submitted by: Adrian Filipi-Martin <adrian@ubergeeks.com>