- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

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

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

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

Sort options.
Add comment on standards conformity.

MFC after: 14 days

Make parameters to -c and -k options optional. If no parameters are
supplied, print information for all keywords.

Improve output of -c option, in particular in conjunction with -k
option.

MFC after: 14 days

Remove trailing whitespace per mdoc lint warning

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

Modified locale(1) to be able to show the altmon_X fields and the [cxX]_fmt's.
Also modify the "-k list" option to display only fields with a certain prefix.

MFC after: 1 week

Xref setlocale(3), bump document date.

Use the standard section name.

Added the EXIT STATUS section where appropriate.

Clean up language and markup.

Grammar, spelling and punctuation sweep.

Approved by: re (rwatson)

Add support of '-m' option to show charmaps (or correctly to say list of
available codesets)

Modify manpages appropriatelly

document 'list' keyword & fix few typos

Add minimalistic manual page for locale(1)