Modify FastCGI server to use MySQL for auth

Modify FastCGI server to use MySQL for auth

Made some general improvements to Login_Handler and how the "auth_uri" is dealt with.
Called strsep, but it's not (that) evil since it doesn't do anything I wouldn't have done with boilerplate anyway.

MySQL for auth tested and appears to work. Using SHA6 instead of md5 (!) hashes.