[rt46602] Miscellaneous changes to existing parallelised tests
Currently these tests are allow_query, rpzrecurse and serve-stale 1. Function to copy files and set port numbers renamed from copy_config to copy_setports, as this is used to change the ports in Perl and Python test scripts as well. 2. Changes to rpzrecurse/tests.sh to handle two calls to getopts (one to parse port numbers, the other to parse rpzrecurse-specific options). Also fixed various commands to use correct ports. 3. Updates to "clean.sh" scripts to ensure that all files created in the test are removed.
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