Special handle localhost/127.0.0.1 in handshakes?

[ktoso]

When we get handshakes we compare the string of the passed in host i.e. "localhost" to what we bound to.

If we bound to 127.0.0.1 but someone tries to handshake with localhost, we'd reject this (!).

Ideas

• perhaps we should resolve the incoming hostname before comparing it with the host we bound to?
• perhaps special treating localhost and its IPv4 and IPv6 representations in handshakes?

[ktoso]

See also: #577 (comment)