title: Error Installing any module using pip, but easy_install works
body: <p>I get this error whenever I try to install any module using pip, but easy_install work perfectly. I have no proxies configured in my Ubuntu 12.04 machine.
  Previously it was working fine, just dnt know, how it stoped working suddenly.</p>
  
  <p>This is error i get, while running <code>sudo pip install &lt;any_package_name&gt;</code>:</p>
  
  <pre><code>Exception:
  Traceback (most recent call last):
    File "/tmp/tmpOA61D3/pip.zip/pip/basecommand.py", line 246, in main
      status = self.run(options, args)
    File "/tmp/tmpOA61D3/pip.zip/pip/commands/install.py", line 342, in run
      requirement_set.prepare_files(finder)
    File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 345, in prepare_files
      functools.partial(self._prepare_file, finder))
    File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 290, in _walk_req_to_install
      more_reqs = handler(req_to_install)
    File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 415, in _prepare_file
      req_to_install, finder)
    File "/tmp/tmpOA61D3/pip.zip/pip/req/req_set.py", line 376, in _check_skip_installed
      finder.find_requirement(req_to_install, self.upgrade)
    File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 425, in find_requirement
      all_versions = self._find_all_versions(req.name)
    File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 349, in _find_all_versions
      index_locations = self._get_index_urls_locations(project_name)
    File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 323, in _get_index_urls_locations
      page = self._get_page(main_index_url)
    File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 789, in _get_page
      return HTMLPage.get_page(link, session=self.session)
    File "/tmp/tmpOA61D3/pip.zip/pip/index.py", line 878, in get_page
      "Cache-Control": "max-age=600",
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 476, in get
      return self.request('GET', url, **kwargs)
    File "/tmp/tmpOA61D3/pip.zip/pip/download.py", line 367, in request
      return super(PipSession, self).request(method, url, *args, **kwargs)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 464, in request
      resp = self.send(prep, **send_kwargs)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/sessions.py", line 576, in send
      r = adapter.send(request, **kwargs)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/cachecontrol/adapter.py", line 46, in send
      resp = super(CacheControlAdapter, self).send(request, **kw)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/adapters.py", line 370, in send
      timeout=timeout
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 544, in urlopen
      body=body, headers=headers)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 341, in _make_request
      self._validate_conn(conn)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 762, in _validate_conn
      conn.connect()
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/connection.py", line 238, in connect
      ssl_version=resolved_ssl_version)
    File "/tmp/tmpOA61D3/pip.zip/pip/_vendor/requests/packages/urllib3/contrib/pyopenssl.py", line 296, in ssl_wrap_socket
      cnx.set_tlsext_host_name(server_hostname)
  AttributeError: '_socketobject' object has no attribute 'set_tlsext_host_name'
  </code></pre>