use /etc/ for *.sock file

examples/config/es6_supervisor.conf

@@ -7,13 +7,13 @@ logfile_backups=10
 minfds=100000
 
 [unix_http_server]
-file=/tmp/supervisor.sock   ; (the path to the socket file)
+file=/etc/supervisor.sock   ; (the path to the socket file)
 
 [rpcinterface:supervisor]
 supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
 
 [supervisorctl]
-serverurl=unix:///tmp/supervisor.sock
+serverurl=unix:///etc/supervisor.sock
 
 [program:es]
 command=/usr/local/elasticsearch/bin/elasticsearch