Changes in this release:
- move tc commands to functions as they're the same for ingress
and egress. - now allows starting from hotplug if there is no qdisc already active
on nssifb - reverted shaper burst value to standard SQM - seems to perform better
- calculated queue limits if no queue limit is specified by the user
- allow setting flows via the advanced options string
- MTU is now obtained from the interface and OVERHEAD is added to it.
Defaults to 1518 as this appears to be the packet size for the qdisc.
This value is now used throughout for all calculations - better error handling
- fix generating statefiles when using a subinterface