[Samba] Patch addressing only the 2.2.7 security problem

[Jan Houstek]

2.2.8 is not only a security release, many things have changed between
2.2.7a and 2.2.8. Unfortunately, the backport of ACL code from 3.0 makes
problems for me, so I'd like do continue using 2.2.7a with the security
bug repaired.

Would this be possible?

-- Honza Houstek