Philip Withnall authored Dec 16, 2013 and Olivier Crête committed Jan 31, 2014

This compartmentalises it a little more, reducing the spread of
state-changing code from three files down to one.

The key change is the switch from using two GSLists of NiceSockets and
GSources in Component, to using a single GSList of a struct {
NiceSocket, GSource }. This is possible because there is at most one
GSource per NiceSocket. This change reduces memory overhead (from the
GSList structures) slightly, and makes the relationship between sockets
and sources much clearer.