scripts/delete_flight_by: use outerjoin for takeoff_airport column
scripts/delete_flight_by: use outerjoin for takeoff_airport column

shadowoneau/skylines,kerel-fs/skylines,snip/skylines,kerel-fs/skylines,shadowoneau/skylines,Harry-R/skylines,TobiasLohner/SkyLines,skylines-project/skylines,RBE-Avionik/skylines,skylines-project/skylines,snip/skylines,kerel-fs/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,Harry-R/skylines,skylines-project/skylines,TobiasLohner/SkyLines,shadowoneau/skylines,RBE-Avionik/skylines,Turbo87/skylines,Harry-R/skylines,Turbo87/skylines,shadowoneau/skylines,skylines-project/skylines,Turbo87/skylines,Harry-R/skylines,snip/skylines,Turbo87/skylines,TobiasLohner/SkyLines