[Update] 添加eventlet

jms

@@ -122,6 +122,7 @@ def start_gunicorn():
     cmd = [
         'gunicorn', 'jumpserver.wsgi',
         '-b', bind,
+        '-k', 'eventlet',
         '-w', str(WORKERS),
         '--access-logformat', log_format,
         '-p', pid_file,