9713b58caa
Callsites no longer allocate a mux. Master now exposes method to install handlers which use the master's auth code. Not used but forks (openshift) are expected to use these methods. These methods will later be a point for additional plug-in functionality. Integration tests now use the master-provided handler which has auth, rather than using the mux, which didn't. Fix TestWhoAmI now that /_whoami sits behind auth.