xchat: also change font size to 8pt, in accorcdance with commit 105407e
xinitrc: don't let dbus-daemon running after X session, caused by workaround for debbug #677456
set-wallpaper: awsetbg -l seems to be flaky, better remember last wallpaper ourselves; less bashisms; better documentation
awesome: tag 4 with tile default layout, for terminals