Make smb plugin aware of share acls
smb.sharesec.getacl - returns ACL of share specified as argument 1.
smb.sharesec.setacl - sets an ACL on a share (both in share_info.tdb and cifs_share_acl)
smb.sharesec.synchronize_acls - writes the ACLs backed up in cifs_share_acl to share_info.tdb if
share_info.tdb is empty. This can happen if boot device fails or post-upgrade. Otherwise,
this call will update the database with the ACL stored in share_info.tdb if there is a
discrepency between the two.
Preference is given to the running copy of share_info.tdb because it may be modified
by SMB clients.
UnifiedSplitRaw
