Renamed 'optin consent' to 'agree to terms of use'. New config.xml variable name.
Decoupled new user agree to terms of use from existing users. If there is a ENROLL terms of use, and the project has enabled the 'enable_login_mustagree_termsofuse' boolean, then existing users must agree to the terms of use when the login, and this is recorded in the consent table.
Shawn Kwang