Revert "prosody: fix restart loop on rolling deployment"

This reverts commit cc2c0424dd7f567506b27e9f0f321ff62a4fe763.

prosody/rootfs/defaults/prosody.cfg.lua

@@ -93,7 +93,7 @@ allow_registration = false;
 
 daemonize = false;
 
-pidfile = "/tmp/prosody.pid";
+pidfile = "/config/data/prosody.pid";
 
 -- Force clients to use encrypted connections? This option will
 -- prevent clients from authenticating unless they are using encryption.