Login results in a blank page after activating OpenID

[Daniel Tien]

Many installations do not have a random number generator, and as such, installing OpenID will break the login page for all logins for some versions, and only the OpenID login for others.

Running debug, the php error pointed to a missing random generator in CryptUtil.php

The workaround is to edit the php file and change the Auth_OpenID_RAND_SOURCE value to null, in order to let the system use a pseduorandom generator instead:

    define('Auth_OpenID_RAND_SOURCE', null);

This quirk is not mentioned in the README file, and should be noted so that the person installing can either install or switch the generator to "null"

[Hubert Chathi (uhoreg)]

I believe this is essentially a duplicate of bug #285838. https://bugs.launchpad.net/moodle-openid/+bug/285838