Initial commit.
Forward to all servers before processing repsonses.

This ensure that each client has the maximum amount of time to respond and thus allows for larger server counts behind one proxy.
Small documentation fixes.
Utilize socket_sendto() instead of creating new socket.
Add support for running proxy as Docker container.
Update stage1/docker-php to @dev to solve issue with large response paging.
Implement request caching to handle heavy loads.
Add README and related screenshots.
Check that incoming back is indeed A2S_INFO packet.

Issue surfaces when cache was added that INFO responses will be returned for non-info request.
Move set_port into util.php to make way for testing.
Add tests!
Remove -p port mapping since using --net host now.
Remove equal sign from --net option to be consistent.