which invokes XenForo_Helper_Http::getClient.
There I have to add parameters for Zend Proxy. All is done in a new add on.
I have written a listener with load_class_model, but infortunately extending XenForo_Model_Avatar
does not work this way. I guess that's because 'gravatarExists' is a static method and therefore
XenForo_Model_Avatar is not instantiated.
Any suggestions how to solve this problem?