Ability to run testcases via regular expression

Currently the testing infrastructure makes it possible to specify individual testcases using the "qfile" switch, e.g.:

ant test -Dtestcase=TestCliDriver -Dqfile=udf_sin.q,udf_cos.q,udf_acos.q

I would also like to be able to specify testcases using a regular expression, e.g.:

ant test -Dtestcase=TestCliDriver -Dqfile_regex="udf.*"

The previous command should trigger the execution of all testcases starting with "udf".