ssh_connect.py:  The "-oIdentityFile='/dev/null'" argument has been changed so that it will now use "-oIdentitiesOnly=yes" instead.  It's a better way of doing essentially the same thing.
core/utils.py:  Changed the signing type from 'md5' to 'sha512' in `gen_self_signed_pyopenssl()`.
core/configuration.py:  A minor fix for pretty printing of JSON parsing errors in Python 3.
core/configuration.py:  Added support for trailing commas in Gate One's JSON-like .conf file format (ValueError exceptions after commenting out single lines were getting annoying).