prep.py: _select_reference_directory() improvements
Make _select_reference_directory()
only process php-* dirs that
correspond to valid version numbers. Use new utils.valid_version()
to perform this function. Remove special case handling for master
and branch_cut_pretest
.
Related MRs:
- !381 (merged)
- !384 (merged)
- !387 (merged) (This MR)
- master