* moves definitions of listener macros to own file
* moves listen directives to own file
* adds internal listener
* when kamailio <-> freeswitch is done on local net
* adds advertise, external
* ports can be redefined
* registrar proxy_path set with dependency from internal listener
* allow extra defs in untracked custom-defs.cfg
* allow custom listeners in untracked custom-listeners.cfg
* adds macro to skip default listeners
kazoo-kamailio
* allow LOCAL_IP_INTERFACE env to check
for local ip (docker in swarm mode)
* boot as option to call prepare & start