Fix mailto links and add category in the gtk-engines.doap file
Fix mailto links and add category in the gtk-engines.doap file

Distrotech/gtk-engines,GNOME/gtk-engines,Distrotech/gtk-engines,Distrotech/gtk-engines,GNOME/gtk-engines,Distrotech/gtk-engines,GNOME/gtk-engines,GNOME/gtk-engines