Do not prefetch URLs unless they are messages or /me actions

ACTION & MESSAGE type messages should be prefetched by default

src/plugins/irc-events/message.js

@@ -91,6 +91,9 @@ module.exports = function(irc, network) {
 		});
 		chan.pushMessage(client, msg, !self);
 
+		// No prefetch URLs unless are simple MESSAGE or ACTION types
+		if ([Msg.Type.MESSAGE, Msg.Type.ACTION].indexOf(data.type) !== -1) {
 			LinkPrefetch(client, chan, msg);
 		}
+	}
 };