Enable testMultilinkOrdering check. Fix back_anydbm to pass. The testMultilinkOrdering was commented out with a "some day" comment. Well some day is today. Works on anydbm and sqlite. CI will tell me if I need to fix mysql and postgres.

#!/usr/bin/env python
from __future__ import print_function
import zlib, base64, sys
print(base64.encodestring(zlib.compress(sys.stdin.read())))