Auxiliary process opens unnecessary network sockets

[gfphoenix78]

Data exchange between backend processes uses network sockets. The listener socket is created when the backend process is initialized. However, some auxiliary process doesn't require interconnect for data exchange.
Exposing unnecessary network ports is not a good idea, which may be considered security issue in a higher standard.

[gfphoenix78]

For example, the fts-probe process listens the UDP port, but not used.

[TamimEhsan]

@gfphoenix78 Hi, I'm new here. I would like to take this one.