Take into account local Unix domain sockets for host

[memer-boy]

Great job with this lib, and thank you all for your work, found an issue today after updating to 0.13:

pgo/src/pgo_handler.erl

Line 111 in d1989c4

{<<"net.peer.name">>, iolist_to_binary(Host)},

The above line is crashing my app as I work with local Unix domain sockets for DB connection, the code should check for a tuple before applying the above conversion.

[tsloughter]

Sorry, thought I replied to this. I'll get this patched, thanks for reporting it!