Conflict with Secure Pages Module

Issue Summary

When using this module with the Secure Pages module, accessing /user doesn't work because of certain functions used to rewrite the url in Secure Pages. To get around this, I adjusted the weight of the Secure Pages module in the system table to 6 in order to allow IPAuthenticator to run first. I'm not sure if maybe IPAuth should default to 0 weight or something like that so that it can make sure anyone accessing /user as an IPAuth gets their uid set to 0 vs. being forwarded to the actual user's profile page (like what happens when you turn on Secure Pages).