better way to stop engine with process signals

--HG--
extra : convert_revision : svn%3Ab85faa78-f9eb-468e-a121-7cced6da292c%4046

scrapy/trunk/scrapy/core/engine.py

@@ -121,7 +121,6 @@ class ExecutionEngine(object):
                 reactor.listenTCP(*args, **kwargs)
             self.running = True
             reactor.run() # blocking call
-            self.stop()
 
     def stop(self):
         """Stop the execution engine"""

scrapy/trunk/scrapy/core/manager.py

@@ -57,7 +57,8 @@ class ExecutionManager(object):
         """Start the scrapy server, without scheduling any domains"""
         self.configure(**opts)
         scrapyengine.keep_alive = True
-        scrapyengine.start()
+        scrapyengine.start()# blocking call
+        self.stop()
 
     def stop(self):
         """Stop the scrapy server, shutting down the execution engine"""