This method verifies the given username and passwords against the entry in the loaded
smbpasswd file. The given passwords must already be a valid NT-Hash or LM-Hash, whereas the
LM-Hash is optional.
Parameter
string $user - username to be verified
string $nthash - the NT-Hash
string $lmhash - the LM-Hash
Return value
mixed - Returns TRUE on success, FALSE on failure.