getpr - downloads a problem report from GNATS and attempts to extract
the patch, shar, uuencoded file from it.
this probably needs to be checked for potential security problems.
prpatch - just does `patch $1 < pr-patch' (pr-patch is created by getpr)
prdone - checks in the port, attempting to fill out the commit message using
information from the problem report and then takes you into edit-pr
so you don't forget to close the PR.
