mkrelease.sh: consolidated changelog entry times
mkrelease.sh: consolidated changelog entry times

tim-janik/beast,swesterfeld/beast,GNOME/beast,tim-janik/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast,GNOME/beast,GNOME/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast,GNOME/beast,tim-janik/beast,swesterfeld/beast,GNOME/beast,GNOME/beast,swesterfeld/beast,GNOME/beast,swesterfeld/beast