- 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

Convert files over to UTF-8.

These files contained various combinations of Big5, eucJP and KOI8-U
encoded strings. The byte representations of their respective encodings
have been translated to $'...' escape sequences as understood by our sh(1).

With help from: jilles

Adding another multi-byte characters related regression test for recent
nmount(2) adoption.