couch_sevrer_sup:restart_core_server()

[Robert Dionne]

In debugging a nit with couch_config_wrtier is was necessary to modify  
restart_core_server to also restart couch_config (to trap it in distel)

The question arose whether or not restart_core_server should do this  
anyway. I can see one use case where a sysadmin makes changes to the  
ini files and then wants to restart the server.