The broker binds a ROUTER socket to tcp://0.0.0.0:5555. The clients
connects using a DEALER socket to tcp://172.16.16.228:5555.
Client connects to the server over a socket and sends a command:
REGISTER <my ip address>:<port number>
The broker responds with a list of peers in the following whitespace separated formatted response:
<ip address>:<port> <ip2>:<port2> ...
The broker also provides a list of registered clients without the client having to register itself, like this:
LIST
to which the broker responds with the same list of clients detailed above.