Tests: load configuration from the given file

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Net: handle bind and unbind correctly

Net can now remember previous bindings and it will unbind them when the
connection to a server is lost.

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Router: handle stanza ID for correct response

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>
Very stupid unit test for router component

Signed-off-by: Daniele Ricci <daniele.athome@gmail.com>