prosody: enable limits

* feat: Enables limits with default values from upstream.

* feat: Enables limits_exception module and adding jicofo and jvb.

Removes the limits for the jicofo and jvb connections.

prosody/rootfs/defaults/prosody.cfg.lua

@@ -43,6 +43,7 @@ modules_enabled = {
 	-- Not essential, but recommended
 		"private"; -- Private XML storage (for room bookmarks, etc.)
 		"vcard"; -- Allow users to set vCards
+		"limits"; -- Enable bandwidth limiting for XMPP connections
 
 	-- These are commented by default as they have a performance impact
 		--"privacy"; -- Support privacy lists
@@ -93,6 +94,16 @@ allow_registration = false;
 
 daemonize = false;
 
+-- Enable rate limits for incoming client and server connections
+limits = {
+  c2s = {
+    rate = "10kb/s";
+  };
+  s2sin = {
+    rate = "30kb/s";
+  };
+}
+
 pidfile = "/config/data/prosody.pid";
 
 -- Force clients to use encrypted connections? This option will