This commit aims to improve the documentation examples that send
sockets over IPC channels. Specifically, pauseOnConnect is added
to a server that inspects the socket before sending and a
'message' handler adds a check that the socket still exists.
PR-URL: https://github.com/nodejs/node/pull/13196
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>