ignore error in parsing remote address

[akirakoyasu]

whitelist.include?(network.to_s) raises an error in parsing remote address in case the address is not IPv4 or IPv6 format.

I met the case on an environment that the rails-server is used as upstream of nginx proxy through an unix socket. At that time, the remote address is "unix:".

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[gsamokovarov]

Interesting case. Do you mind adding a test for it?

[akirakoyasu]

Thanks. added test.

[gsamokovarov]

Thanks! 🥛