handlers: change all handlers to pass down http request
handlers: change all handlers to pass down http request

Signed-off-by: Yannis Zarkadas <4575790e8e8b84da294884a87fd791e10dfc7d9d@arrikto.com>

coreos/dex,coreos/dex,coreos/dex,wolfeidau/dex,ericchiang/dex,wolfeidau/dex,ericchiang/dex,wolfeidau/dex,ericchiang/dex