ssh_connect.py:  Added `GO_TERM` and `GO_SESSION` to the list of environment variables that get exported when an SSH connection is made.  Note that I *did* double-check that having the user's session ID will not be useful to an attacker (full code audit in regards to sessions)...  The session ID is only useful from the perspective of of a plugin trying to identify a user.  An attacker cannot impersonate a user just by having the session ID...  They'd also need to know the `cookie_secret` in order to encrypt it in such a way as to make the server accept it.
auth.py:  Fixed a minor issue with `require()` to make it more portable/universal.
utils.py:  Improved a few docstrings.