I'm making some additions / corrections.

• Fix Socket::Addrinfo#resolve to return more than one result.
• Better documentation for how Socket::Addrinfo#resolve(&block) expects the block to behave.
• Improved Socket::Addrinfo#resolve(&block) to only raise if the returned value is an Exception, otherwise returns the value.
• Fixed Socket::Addrinfo#ip_address that failed to compile.
• Improved specs to catch the above issues.

I think I'm done. What do you think?

@ysbaddaden Looks good to me, though it's true what @miketheman mentions that IPAddress currently has a port, which feels odd (but it had it before, so we can probably improve/fix this after merging this PR). So merge if you want :-)

Well, it's actually a Socket::Address aka sockaddr in POSIX, not just an IPAddress.

It got an IP prefix because it's different from an UNIXAddress and nicer than the in suffix of sockaddr_in.

Let's merge this :-)

@ysbaddaden Thank you!