- rewrite the RED qdisc calculations and add some comments
this should fix the warnings about bursting (should also fix quirks with various linespeed settings)
- reduce the calculated overhead for upstream, while i'm at it...
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7782 3c298f89-4303-0410-b956-a3cf2f4a3e73