fix readlines method

--HG--
extra : transplant_source : b%0D%F9%87%CB%0DjA%D1%B5%D8%13b%3E%FA%DC%FC%14%F1%8D

gevent/pywsgi.py

@@ -122,7 +122,7 @@ class Input(object):
         return self._do_read(self.rfile.readline)
 
     def readlines(self, hint=None):
-        return self._do_read(self.rfile.readlines, hint)
+        return self.__iter__()
 
     def __iter__(self):
         while 1: