Change expire to only take "max post".

In modern servers, it does not make any sense to expire by date.
Let's always only consider "max post".


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5885 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Adjust ch.getting_old formula.

We want to fix the overflow bug in future.
But before that, we should make the whole getting old calculation more feasible
since most people can't access their pets every 6 hours. (Or, we can say,
the chicken now is different from how it was invented before - it's now a more
long-term game for most people)


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5886 63ad8ddf-47c3-0310-b6dd-a9e9d9715204
Fix NIOS debug calls


git-svn-id: http://opensvn.csie.org/pttbbs/trunk@5887 63ad8ddf-47c3-0310-b6dd-a9e9d9715204