Xenforo - Fix Keycloak integration with Registrations

[uaon]

Propose changes to the following:

Current link to register:

https://auth.7cav.us/auth/realms/7Cav/login-actions/registration?client_id=xenforo&tab_id=

New link on Registration would use:

http://auth.7cav.us/auth/realms/7Cav/protocol/openid-connect/registrations?client_id=xenforo&response_type=code&scope=openid email&redirect_uri=http://7cav.us/&kc_locale=en

Also will need to look into adding a way to set the email validation to redirect to /connected-accounts/* uri

[uaon]

Will need to dive into keycloak docs to see how to change email configurations for the email validation. currently the link back to the forums just goes to the index, rather than the connected accounts modal/page.