wsgiserver.py: rename 'hello_world' to 'application'; only start server if run...

wsgiserver.py: rename 'hello_world' to 'application'; only start server if run as a script (so that it can also be run by another server)

examples/wsgiserver.py

@@ -4,7 +4,7 @@
 from gevent.pywsgi import WSGIServer
 
 
-def hello_world(env, start_response):
+def application(env, start_response):
     if env['PATH_INFO'] == '/':
         start_response('200 OK', [('Content-Type', 'text/html')])
         return ["<b>hello world</b>"]
@@ -12,5 +12,7 @@ def hello_world(env, start_response):
         start_response('404 Not Found', [('Content-Type', 'text/html')])
         return ['<h1>Not Found</h1>']
 
-print 'Serving on 8088...'
-WSGIServer(('', 8088), hello_world).serve_forever()
+
+if __name__ == '__main__':
+    print 'Serving on 8088...'
+    WSGIServer(('', 8088), application).serve_forever()