This patch updates qos-scripts to support fair traffic sharing using the

This patch updates qos-scripts to support fair traffic sharing using the
SFQ with external classifiers method.  It also corrects a bug in the
unsupported ESFQ method already used by qos-scripts.  (ESFQ:
http://fatooh.org/esfq-2.6/ only updated to 2.6.24, it was switched to
an SFQ patch after that and not updated since 2008)

A class can be forced to use SFQ, and an external classifier added like
this:

config class "Normal"
         option avgrate     10
         option priority    30
         option packetdelay 100
         option limitrate   94
#       option qdisc      "sfq perturb 2"
config class "Normal_up"
#       option filter   "protocol all flow hash keys src divisor 1024"
config class "Normal_down"
#       option filter   "protocol all flow hash keys dst divisor 1024"

Using these options, the user needs to load cls_flow before qos-scripts
starts.

I've got more information here:
http://oneitguy.com/blogs/netprince/fair-traffic-sharing-esfq-broken-switching-sfqexternal-classifiers

This has been tested on r23914.

Signed-off-by: Ben Pfountz <netprince<>vt_edu>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26622 3c298f89-4303-0410-b956-a3cf2f4a3e73