Add a note about commiting suicide

src/cascadia/WindowsTerminal/AppHost.cpp

@@ -194,12 +194,6 @@ void AppHost::_HandleCommandlineArgs()
         // use to send the actions to the app.
         peasant.ExecuteCommandlineRequested({ this, &AppHost::_DispatchCommandline });
     }
-
-    // TODO:projects/5 if we end up not creating a new window, we crash. I'm
-    // thinking this is because the XAML host is not happy about being torn
-    // down before it has a chance to do really anything. Is there some way
-    // to get the app logic without instantiating the entire app? or at
-    // least the parts we'll need for remoting?
 }
 
 // Method Description:

src/cascadia/WindowsTerminal/main.cpp

@@ -126,7 +126,10 @@ int __stdcall wWinMain(HINSTANCE, HINSTANCE, LPWSTR, int)
     AppHost host;
     if (!host.HasWindow())
     {
-        // return 0;
+        // If we were told to not have a window, exit early. Make sure to use
+        // ExitProcess to commit sepuku here. If you try just `return 0`, then
+        // the XAML app host will crash during teardown. ExitProcess avoids
+        // that.
         ExitProcess(0);
     }