catch more error cases

lib/vhost-sni-server.js

@@ -87,6 +87,11 @@ module.exports.create = function (securePort, certsPath, vhostsdir) {
 
           console.log('[log] LOADING "' + domaininfo.hostname + '/' + domaininfo.pathname + '"');
           getAppContext(domaininfo).then(function (localApp) {
+            //if (localApp.arity >= 2) { /* connect uses .apply(null, arguments)*/ }
+            if ('function' !== typeof localApp) {
+              localApp = getDummyAppContext(null, "[ERROR] no connect-style export from " + domaininfo.dirname);
+            }
+
             // Note: pathname should NEVER have a leading '/' on its own
             // we always add it explicitly
             try {
@@ -156,10 +161,12 @@ module.exports.create = function (securePort, certsPath, vhostsdir) {
             , port: securePort
             , url: domaininfo.pathname
             });
+
             if (!localApp) {
-              return getDummyAppContext(null, "[ERROR] no app was returned by app.js for " + domaininfo.driname);
+              localApp = getDummyAppContext(null, "[ERROR] no app was returned by app.js for " + domaininfo.dirname);
             }
           }
+
           if (!localApp.then) {
             localApp = PromiseA.resolve(localApp);
           } else {
@@ -170,8 +177,6 @@ module.exports.create = function (securePort, certsPath, vhostsdir) {
         } catch(e) {
           localApp = getDummyAppContext(e, "[ERROR] could not load app.js for " + domaininfo.dirname);
           localApp = PromiseA.resolve(localApp);
-
-          return localApp;
         }
 
         return localApp;