- parse version numbers of ports containing an underscore followed by a number correctly
- handle special strings pl, alpha, beta, pre and rc
PR: 56961
that actually conforms to the Porters Handbook.
Add a -t option to pkg_version(1) for doing comparison testing.
Add a script (and make test target) to do some regression tests on
the package number comparison routine, to help debug future revisions.
Submitted by: knu
Procrastination by: bmah
