Fixing mate-terminal URL highlighting

Update 2020-04-17: Both of my patches have been included upstream and in the Debian package 1.4.0-3, so I removed the packages from my own space.

One of the recent updates in Debian swept in changes so that mate-terminal couldn’t highlight URLs anymore (Debian bug report, upstream bug report). I got so fed up with this that I fixed it and send a pull request. Update Debian packages for amd64 Debian/sid are in my usual repo at https://www.preining.info/debian/.

Enjoy.