I'm not stupid, absolutely certain.

at ligne 795 in gevent/socket.py :
try:
from gevent.ssl import sslwrap_simple as ssl, SSLError as sslerror, SSLSocket as SSLType
_have_ssl = True
except ImportError:
try:
from gevent.sslold import ssl, sslerror, SSLObject as SSLType
_have_ssl = True
except ImportError:
pass

Same error, it seems to be a python centos problem :
/usr/lib64/python2.6/site-packages/gevent/socket.py:795: DeprecationWarning: gevent.sslold is deprecated; use gevent.ssl instead (install ssl package from PyPI)
from gevent.sslold import ssl, sslerror, SSLObject as SSLType

When i want install ssl mod with pip, i have this error :
pip install ssl
Downloading/unpacking ssl
Running setup.py egg_info for package ssl
Traceback (most recent call last):
File "<string>", line 16, in <module>
File "/tmp/pip-build-root/ssl/setup.py", line 12, in <module>
+ "or earlier.")
ValueError: This extension should not be used with Python 2.6 or later (already built in), and has not been tested with Python 2.3.4 or earlier.
Complete output from command python setup.py egg_info:
Traceback (most recent call last):

File "<string>", line 16, in <module>

File "/tmp/pip-build-root/ssl/setup.py", line 12, in <module>

+ "or earlier.")

ValueError: This extension should not be used with Python 2.6 or later (already built in), and has not been tested with Python 2.3.4 or earlier.

----------------------------------------
Command python setup.py egg_info failed with error code 1 in /tmp/pip-build-root/ssl
Storing complete log in /root/.pip/pip.log

Same for me on Centos 6.5, python-gevent=0.13.8, latest chrome and firefox and this message in ajenti.err.log : /usr/lib64/python2.6/site-packages/gevent/socket.py:795: DeprecationWarning: gevent.sslold is deprecated; use gevent.ssl instead (install ssl package from PyPI)
from gevent.sslold import ssl, sslerror, SSLObject as SSLType

No problem without https