This patch prohibits changing of agreed_to_tos and agreed_to_tos_on by the Logic module.
This is used so that legally the agreed_to_tos fields can never change in the User model once set.
Patch by: Haoyu Bai
Reviewed by: Lennard de Rijk
import os, sys
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
import pkg_resources
pkg_resources.require('WebOb')