Print responsible maintainer after each release (and more)
Instead of this:
GNOME 43.4 stable tarballs due, GNOME 42.9 oldstable tarballs due (and more) (responsible: mcatanzaro, alatiera, abderrahim)
Let's print this:
GNOME 43.4 stable tarballs due (responsible: alatiera), GNOME 42.9 oldstable tarballs due (responsible: mcatanzaro) (and more)
Also, fix 44.beta not showing up in the subject at all.
And, add a test mode to make changes easier in the future.