I've made some minor adjustments to the way quota are handled. Or
rather, to the way that a user's quotum is updated. Instead of using
db_calculate_quotum_used() after every insert, I've now used a new
function db_add_quotum_used() which adds the message size to the new
quotum.
This is all fine, and it works, except for the fact that the
curmail_size is not lowered again on deletion of a message. I'll fix
that tomorrow. :)
This stuff should gives us some more speed (less complex queries),
especially on message insertion.
Ilja
