Bugs

For the final commit, we are wrapping things up with a few small bug fixes.

Bitnodes.io refuses to detect our node and Bitcoin core shows strange data on the getpeerinfo report. It turns out that we should

• have a protocol version number of at least 70001,
• have // in our user agent name,
• and there were issues with sending the network address. The port should be sent in big endian and sometimes the java library gives us a IPv6 address instead of a IPv4.

We were also not sending our current height in the version message.