Ceros yas3fs Modifications - DO NOT MERGE (NEEDS TO  BE TAGGED)

This is mainline yas3fs at tag v2.2.8 with the read only changes added i (from https://github.com/danilop/yas3fs/commit/7ee12187811c6120919a99c07f23a939dbc3e77f), and our own Ceros modification to allow reset by a path or partial path.

This should NOT be merged to ceros/yas3fs/master and instead be tagged directly from this branch.