[master] testcrypto.sh in system tests

3714.	[test]		System tests that need to test for cryptography
			support before running can now use a common
			"testcrypto.sh" script to do so. [RT #35213]

bin/tests/system/dlzexternal/prereq.sh

@@ -14,10 +14,6 @@
 # OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
 
-# $Id: prereq.sh,v 1.7 2011/03/20 09:03:47 marka Exp $
-
-TOP=${SYSTEMTESTTOP:=.}/../../../..
-
 ./dlopen ||  {
         echo "I:dlopen() not supported - skipping dlzexternal test"
         exit 255