[collectd] traffic plugin..

[Christophe Kalt]

The traffic plugin captures very little data, i don't know
whether this is intended or not.

Looking at Solaris data available, the following are often used:

bge:0:statistics:ifHCInBroadcastPkts    307798
bge:0:statistics:ifHCInMulticastPkts    25713
bge:0:statistics:ifHCInOctets   220992515673
bge:0:statistics:ifHCInUcastPkts        306540776
bge:0:statistics:ifHCOutBroadcastPkts   21501
bge:0:statistics:ifHCOutMulticastPkts   0
bge:0:statistics:ifHCOutOctets  231103378495
bge:0:statistics:ifHCOutUcastPkts       332141639
bge:0:statistics:ifInDiscards   0
bge:0:statistics:ifInErrors     0
bge:0:statistics:ifOutDiscards  0
bge:0:statistics:ifOutErrors    0

Thoughts?