rtl_ais TCP server example doesn't work

[mik3y]

Using rtl_ais tcp listener, the connection sends a burst of accumulated data, and then no more. In other words, it doesn't stream forever. The effect is ships appear for a minute or so, then vanish.

This is either a bug with rtl_ais, or I'm misunderstanding on how the TCP server is meant to work.

Once resolved, document/update recommended instructions: https://github.com/mik3y/airdash/wiki/Running-RTL-AIS-on-Raspberry-Pi