[c-nsp] ASR1k Port-channel hash algo

[James Bensley]

Be careful what you wish for with port-channels on the ASR1000 series.

Some features really done work / are quite broken, when they have to
traverse a port-channel.

So far LNS/BRAS features don't work so well unless you use active /
standby links rather than active-active, the same goes for QoS over
port-channels.

My advice is to read the Cisco docs for that ever features you are
using and how well they are supported over port-channels. They cause
me some headaches.

Cheers,
James.