also support oldclient and rename method to "on"

plugins/c9.error/error_handler.js

@@ -115,7 +115,7 @@ function plugin(options, imports, register) {
         var accept = req.headers.accept || '';
 
         if (statusCode == 500) {
-            emitter.emit("serverError", {
+            emitter.emit("internalServerError", {
                 err: err,
                 req: req
             });
@@ -169,9 +169,7 @@ function plugin(options, imports, register) {
 
     register(null, {
         "connect.error": {
-            onInternalServerError: function(handler) {
-                emitter.on("serverError", handler);
-            }
+            on: emitter.on.bind(emitter)
         }
     });
 }

plugins/c9.error/raygun.connect.js

@@ -23,13 +23,9 @@ function plugin(options, imports, register) {
     var connectError = imports["connect.error"];
     var server = imports.http.getServer();
     
-    var noInternalServerErrors = !!options.noInternalServerErrors;
-
-    if (!noInternalServerErrors) {
-        connectError.onInternalServerError(function(msg) {
-            sendRequestError(msg.err, msg.req);
-        });
-    }
+    connectError.on("internalServerError", function(msg) {
+        sendRequestError(msg.err, msg.req);
+    });
 
     errorClient.user = warningClient.user = function(req) {
         return (req && req.user) ? req.user.name : "";