- Setting pytest-xdist this far back was actually a mistake...ugh
- But a few other things also would've popped up anyway with recent cryptography/etc releases

However Paramiko 2.0-2.3 still support those, so.

- bare excepts weren't an error before? huh. too lazy to fix them right now though, given the rest of this code...
- ambiguous variables are new; not clear why they're ambiguous besides being short. but, fixed
- some wacky non-escape sequence in some awful gssapi output strings. whatever. removed