[DEV-1320] Mangle 'index' url name 'askbot-index.' Replace all reverses to 'index' with reverses to 'askbot-index.' (Avoids name collision with Rover.)
[DEV-1320] Mangle url name 'privacy' to 'askbot-privacy.' (Avoids collision with Rover url name.)
[DEV-1320] Change uses of 'privacy' urls in templates url tags to 'askbot-privacy.'
[DEV-1320] Modify mention of 'privacy' url in try_url to 'askbot-privacy.'