Tvheadend

let's assume I have a m3u file which always includes the same channels but the URL/pipe may change. Currently the mux, service and channel are dropped and - if enabled in the bouquet - auto regenerated on the fly. This causes a rescan of the mux (to create the service) and will push a new channel to the client. Further more if the epg source of the channel is from xmltv it will be without epg until the next scheduled import.
It would be nice if just the URL would be update without any further actions either by a special tag in the m3u like tvh-static or eg. if tvh-chnum and the name are identical to a current mux.