unused.

* testsuite/testutils.c (test_mac): New function (currently not
used).
(test_dsa): Replaced by two new functions...
(test_dsa160): New function.
(test_dsa256): New function.
(test_dsa_key): New argument q_size.
(DSA_VERIFY): Generalized.

Rev: nettle/testsuite/testutils.c:1.7
Rev: nettle/testsuite/testutils.h:1.4