udptunnel 1.1 (new formula)

Added new formula for udptunnel. This tool tunnels UDP data over a TCP connection.
Home page at http://wiki.leipzig.freifunk.net/Udptunnel .
Addressed adamv@'s comments at https://github.com/Homebrew/homebrew/pull/29406 .
Changed homepage URL as suggested in https://github.com/Homebrew/homebrew/pull/29406
udptunnel: add 1.1 bottle.