Entry point changed.

sample.conf

@@ -24,7 +24,7 @@ minprocs=200                ; (min. avail process descriptors;default 200)
 ;strip_ansi=false            ; (strip ansi escape codes in logs; def. false)
 
 [rpcinterface:supervisor]
-supervisor.rpcinterface_factory = supervisor.xmlrpc:make_main_rpcinterface
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
 
 [supervisorctl]
 serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket