Application [allows one to configure bitrate limits](https://github.com/strukturag/nextcloud-spreed-signaling/blob/76fa9abd334f88418e7b9d7c8b8b26a882ec1c11/mcu_janus.go#L526) but does [not validate codecs nor profiles](https://github.com/strukturag/nextcloud-spreed-signaling/blob/76fa9abd334f88418e7b9d7c8b8b26a882ec1c11/mcu_janus.go#L508). Consider adding separate config parameter(s) to whitelist allowed codec-profile combinations i.e. to allow only "open" codecs.