Detecting connection to service

[Havoc Pennington]

Roman I Khimov wrote:
> For example, we might have something sort of a shared library available as a 
> set D-Bus objects and want to load it with first app using it (and that is 
> possible today), but unload it when last application using it will close 
> it's D-Bus connection (so it doesn't waste precious memory). 

The simplest approach if it works is to just exit after a timeout (if 
not used for a couple minutes, then exit). If you set things up right 
dbus will autostart it again if someone tries to use it.

Havoc