- 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

Fix comment to reflect what it should be:

yesexpr/noexpr

Add sources for following categories: LC_NUMERIC (share/numericdef),
LC_MONETARY (share/monetdef), LC_MESSAGES (share/msgdef). Now only
en_US.ISO_8859-1 and ru_RU.KOI8-R locales ready. I will find some time
in near future and'll try to make defintions for other locales.