- 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

Add regression test for new NFSv4 ACL semantics, verified with ZFSv28.
Note that to run it, you need not only ZFSv28, but also a modified setfacl(1),
which is not in the tree yet.

Add regression tests for NFSv4 ACLs and update POSIX.1e tests to the changed
error messages.