With this code on python 2.6, I found that HTTPSConnection does not close connection properly.

from httplib import HTTPSConnection

for i in range(1000):
  https = HTTPSConnection("google.com")
  https.connect()
  https.request("GET", "/")
  response = https.getresponse()
  response.close()
  https.close()
  print i

After searching python library, I guess that in ssl.py, implementation of close() method of SSLSocket is wrong.
socket.close(self) should not be called when self._makefile_refs < 1 but should be call when self._makefile_refs == 1, isn't it?
I modified the code, made the patch and attached it with this issue.