Trying to normalize event handling somewhat. More to go before it's simple.

git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@3685 ed5197a5-7fde-0310-b194-c3ffbd925b24

core/core.js

@@ -425,13 +425,13 @@ async function blobHandler(request, response, blobId, uri) {
 	}
 }
 
-ssb.onBroadcastsChanged = function() {
+ssb.addEventListener('broadcasts', function() {
 	broadcastEvent('onBroadcastsChanged', []);
-}
+});
 
-ssb.onConnectionsChanged = function() {
+ssb.addEventListener('connections', function() {
 	broadcastEvent('onConnectionsChanged', []);
-}
+});
 
 async function loadSettings() {
 	try {