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.

git-svn-id: 9d360e937358a6045131c933812460b0d7e6dc2a@2271 7d5e3409-5ede-0310-83dd-dbcb3a32f907

ojab/jhalfs,ojab/jhalfs,ojab/jhalfs