ndg-httpsclient: Enhanced HTTPS with PyOpenSSL

ndg-httpsclient provides enhanced HTTPS support for Python's standard library modules `httplib` and `urllib2` (Python 2) or `http.client` and `urllib.request` (Python 3) using PyOpenSSL. It allows for advanced SSL/TLS features like Server Name Indication (SNI) and robust peer certificate verification, extending capabilities beyond the default standard library implementation. The current version is 0.5.1, with a relatively slow release cadence focused on compatibility and critical fixes.