Fix handling of groff's special patch format. Also, only find the md5sum of the exact package we're downloading, not a spurious copy that has, say, a '.1' or '.2' at the end of the file.
Fix handling of groff's special patch format. Also, only find the md5sum of the exact package we're downloading, not a spurious copy that has, say, a '.1' or '.2' at the end of the file.

bryan5989/jhalfs,bryan5989/jhalfs,bryan5989/jhalfs