weston-launch: Don't start new session unless -u is given
weston-launch: Don't start new session unless -u is given

Gnurou/weston,eyolfson/weston,Fantu/compositor-spice,Fantu/compositor-spice,kwm81/weston,udoprog/weston,giucam/weston,Gnurou/weston,Fantu/compositor-spice,krezovic/weston,xorgy/weston,jonnylamb/weston,Tarnyko/weston-xdg_surface_present,sir-murray/weston,mchalupa/weston,giucam/weston,kwm81/weston,krezovic/weston,udoprog/weston,sir-murray/weston,mchalupa/weston,jonnylamb/weston,eyolfson/weston,Tarnyko/weston-xdg_surface_present,xorgy/weston