Providing certificates to HTTPSConnection was changed in Py 2.7.9, the old
way is still supported, but there is a memory leak (fixed in 2.7.12). The
code was changed to use the new way (SSLContext object) if it's
available, thus avoiding the leak.

Refactored RA for nonglobal logging# Please enter the commit message for your changes. Lines starting

Added combined X509MixMatchAuthenticator, which allows for logging in both clients with hostname cert and with client name cert