Merge branch 'pktgen-scripts'

Jesper Dangaard Brouer says:

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pktgen samples: new scripts and removing older samples

This patchset is adding some pktgen sample scripts that I've been
using for a while[1], and they seams to relevant for more people.

Patchset also remove some of the older style pktgen samples.

[1] https://github.com/netoptimizer/network-testing/tree/master/pktgen
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Signed-off-by: David S. Miller <davem@davemloft.net>