playlist backend: updated list of potential source protocols
playlist backend: updated list of potential source protocols

opendreambox/python-coherence,ismaelgaudioso/Coherence,unintended/Cohen,sreichholf/python-coherence,coherence-project/Coherence,furbrain/Coherence,coherence-project/Coherence,opendreambox/python-coherence,furbrain/Coherence,ismaelgaudioso/Coherence,unintended/Cohen,sreichholf/python-coherence