bug. Now it should actually work even if the user has no warnings.
Also don't list expired/deleted warnings as unacknowledged.
Warning expiration can now be modified via !fwarn set, and the default
expiration is now 30d instead of never (never can be manually specified
along with a handful of aliases that mean the same thing).
These allow for access control, and work pretty much exactly like they
do in atheme's ChanServ (the /cs flags and /cs template commands).
Also remove unused things from botconfig.py.example.
- fwarn/warn commands to view and manipulate warnings
- fstasis can now only decrease stasis, not add to it
- refreshdb command can sync bot game state with what is in the db
(including expiring any unexpired stasis or warnings)
- stasis now expires
- tempban is still not implemented and will not be implemented as
part of the PR (it will come later, if ever)
- sanctions can be automatically applied after warnings cross a
certain threshold; some defaults are configured
