server _onUdpRequest(): don't check empty params, errors will be thrown now
server _onUdpRequest(): don't check empty params, errors will be thrown now

feross/bittorrent-tracker,jhiesey/bittorrent-tracker,precisit/bittorrent-tracker,jhiesey/bittorrent-tracker,prozacchiwawa/bittorrent-tracker,maxogden/bittorrent-tracker,feross/bittorrent-tracker,LinusU/bittorrent-tracker