Description of problem:
Based on conversation in bz 461041, Since I enabled krb5 support in coda (which changed the default auth method) in clog, we need a way to configure the default auth method (since thats a behavioral change we want to avoid).  Either we are just going to change clog to try coda authentication first or implement a config directive in venus to specify the order of auth methods to try (krb4, krb5, coda, etc).  Adam has graciously offered to write the patch