- If an access ACL has a mask, we set it to the group bits of the

- If an access ACL has a mask, we set it to the group bits of the
  file on the disk (which will be 0 for a new file) and let the
  following chmod() fix it.
- The chmod() call now follows set_acl() again.
- Improved the code in receive_rsync_acl().
- If we don't receive one of the  SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ,
  SMB_ACL_OTHER, and/or SMB_ACL_MASK objects, we set the access bits
  based on the incoming file's mode bits.
- Tweaked some comments.