Improve down-vote handling

[s1037989]

From Keith: When a question drops to 0 points, it is completely disappearing. I accidentally clicked on the downvote button, and the question that was previously up there (that I'm sure was a very important question) is no longer visible.

[s1037989]

It appears that you're dropping a question once vote level is 0. It should be lower, like -2 or so.

[s1037989]

Also, Julie informed me that a question was no longer showing up (the one mentioned in this issue) and so I searched the database for it. It appears that it was deleted. The question should not be deleted, just simply not shown. Or, use the filter method and default to not showing under -2, but allow showing all regardless of vote level. I like that. Do it.

[jsiems]

Vote floor is set in the .conf file:
e.x. vote_floor => -2
That should fix the issue of them being deleted when they are under 0, I think? Unless it is already set to -2 and they are being deleted anyway, that would not be good...

[s1037989]

Ah! Of course! I didn't update the prod config file. Thanks!

[s1037989]

Yeah, and make sure that questions are not deleted by downvotes.

Also, update the code to disable this "algorithm" when vote_floor is not set. That's a bad idea when a config isn't set and then questions get deleted!