Prio QoS

We got a brother mfc5890cn, it does IPv6.

• Unfortinately it needs drivers not in debian, and don't really like installing such stuff
• I don't so much like installing such stuff and resist it for reasons other than the "platform" that deb is running on, or auxilliary hardware, which this is.
• Fortunately brother have been making deb files of then
• Infornutaly there is no apt repo so create a fake one

1. Grabbed all availabre brother deb files for local mirror tree
2. have a pristine tree that looks like /mirror/http/www.brother.com/pub/bsc/linux/dlf/ containing assorted debs and rpms
3. tree replicated via overlayfs to /union/http/www.brother.com/pub/bsc/linux/dlf/