- 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

Put the osta.c license on osta.h. The license is the same.

Approved by: scottl@

Add udf_UncompressUnicodeByte() for processing cs0 strings in a way that the
iconv mehtods can handle

Submitted by: imura@ryu16.org

Actually add the UDF files!