run-tests: remove resultslock since it serves no useful purpose Each child process has its own copy of the results dict, so all access to the results dict is serial. [ original upstream message ]

run-tests: use pickle to send results from children to parent JSON would probably be preferable, but it isn't available for Python 2.4 or 2.5. [ original upstream message ]

Merge with stable

run-tests: skip unnecessary operations on the args in the child proces The arguments are already sorted and never empty. [ original upstream message ]