Fixes#321. Due to the extremely large quantity of comments on a
typical Motte post, 'hot' sorting logic underflowed an intermediate
value. Roughly:
|(-1 000 000) * (103 [votes] + 1 + 2723 [comments] / 1)| > 2^31
We resolve this by reducing the coefficient from 1e6 to 1e5, which
reduces precision of intermediate calculations somewhat, and by
dividing #comments by 10 rather than 1, which better matches Motte
user behavior regardless: Users comment much more often than vote.
This buys us two orders of magnitude more headroom before out-of-
bounds. Shouldn't be an issue until the CW thread reaches ~200k
comments.
716f078e81