debug: Make SALUT_DEBUG=discovery work
debug: Make SALUT_DEBUG=discovery work

"discovery" string should match to DISCOVERY not DISCO. as a results
we can see any debug out put when we run tp-salut with
SALUT_DEBUG=discovery

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut