TpStreamTubeChannel: stop using GSocketClient
TpStreamTubeChannel: stop using GSocketClient

It doesn't allow us to bind the client socket before connecting which will be
needed to get the port when using the access control 'Port'.

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