make clear the viral nature does not extend to other network services

Return log warning to debug level.

Edx-platform will be using not_safe_exec in some cases, and we don't
want to log a warning in those cases, so only log when it's an aliased
fallback, not when the function is called directly.

character comes through, we just need to ensure that no exception is
thrown.

We can change AppArmor to not grant access to all of /tmp, and virtualenvs don't need the system Python libraries.

initial AUTHORS file

json_safe() ValueError for unpaired unicode surrogates