#6 Listener doesn't compile with gcc 4.3

[Chris P. Ross]

The change of static void*Connection::manager() to be private makes Listener not compile (with gcc 4.3). It is calling pthread_create() on
Connection::manager(). If this thread start should be internal to Connection (which I think the new design suggests it should be) we need to find a new way for Listener to interact with Connection to start managing a connection that has been accepted.