Merge pull request #2447 from node-red/catch-more-signals

catch more signals to allow clean context flush on shutdown

packages/node_modules/node-red/red.js

@@ -429,11 +429,20 @@ httpsPromise.then(function(startupHttps) {
         process.exit(1);
     });
 
-    process.on('SIGINT', function () {
+    function exitWhenStopped() {
         RED.stop().then(function() {
             process.exit();
         });
+    }
+    process.on('SIGINT', exitWhenStopped);
+    process.on('SIGTERM', exitWhenStopped);
+    process.on('SIGHUP', exitWhenStopped);
+    process.on('SIGUSR2', exitWhenStopped);  // for nodemon restart
+    process.on('SIGBREAK', exitWhenStopped); // for windows ctrl-break
+    process.on('message', function(m) {      // for PM2 under window with --shutdown-with-message
+        if (m === 'shutdown') { exitWhenStopped() }
     });
+
 }).catch(function(err) {
     console.log("Failed to get https settings: " + err);
 });