gabble_presence_cache_is_unsure: presences with keep_unavailable don't count
gabble_presence_cache_is_unsure: presences with keep_unavailable don't count

These aren't really presence, but a pseudo-presence-record from some other
source (currently, a <message>), used to avoid duplicate signals for
someone's nick if they send it in a message.

Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble