idea: add wrapper support to mysqli_connect

Instead of passing localhost to mysqli_connect as the $host parameter I think it'd be useful if you could pass something like ssh2.tunnel://user:pass@example.com:22/192.168.0.1:14 to it as well. The main advantage I see of doing that is that you could tunnel through SSH2, through SOCKS, through HTTP CONNECT, etc, a lot more easily than you currently can. Like you could have an SSH connection re-created every time a PHP script is called and a tunnel dynamically made instead of having a persistent tunnel created with autossh or whatever. And even if SSH2 / SOCKS / CONNECT don't exist as built-in wrappers custom stream wrappers could be made. This would additionally make it easy for people to examine the underpinnings of MySQL. Instead of intercepting the packets the MySQL client sends out and placing them into an SSH tunnel or whatever one could just dump them to a log file to better understand how MySQL clients work internally.