CAS-1480: Move proxy callback url authz from controller over to the handler
Merge branch 'master' into CAS-1480

Conflicts:
	cas-server-core/src/main/java/org/jasig/cas/authentication/handler/support/HttpBasedServiceCredentialsAuthenticationHandler.java
CAS-1480: Moving proxy authz logic over to the handler
CAS-1480: Moving proxy authz logic over to the handler
CAS-1480: Moving proxy authz logic over to the handler
Merge pull request #461 from Unicon/CAS-1480

CAS-1480: Moving proxy authz over to httpBasedHandler