bug using Scott's Barta contributed version from official site:
In standard version _all_ connections with the same IP counted through
scoreboard, despite file type. So, if you set limit 3 to, say, video/avi
type and open 3 connections to unlimited .html or .jpeg, next 1 connection
to video/avi will be rejected (since all, even unlimited connections are
counted through scoreboard)
Approved by: >2 weeks maintainer timeout
