inspect-cm example: allow inspecting all CMs
inspect-cm example: allow inspecting all CMs

Also print a bit more information about protocols, and allow requesting
timestamps in debug output.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=68390
Reviewed-by: Guillaume Desmottes <f16649c7afcd84e3350287183c4ed23cb1aea57c@collabora.co.uk>

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