If RequestableChannelClasses makes no sense, claim CAPABILITIES worked anyway, with no capabilities
If RequestableChannelClasses makes no sense, claim CAPABILITIES worked anyway, with no capabilities

Rationale: Requests is mandatory; if your connection manager is old enough
not to have it, then there's nothing you can successfully pass to
CreateChannel or EnsureChannel, so by the definition of
RequestableChannelClasses, there aren't any.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib