bonding_err_ plugin needs a longer grep on 12.04

[Will Bryant]

The bonding_err_ plugin stopped working after upgrading 10.04 to 12.04. The cause is this line in the plugin:

  grep -A 2 "^Slave Interface: ${if}" ${PROCDIR}/${BONDINGIF} | grep "Link Failure Count:" | cut -d " " -f 4

This looks for a Link Failure Count line within 2 lines after the Slave Interface line.

However on 12.04's 3.2-series kernel, the proc file looks like this:

Slave Interface: eth1
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:21:5e:28:28:18
Slave queue ID: 0

Thus 2 lines is not sufficient. The plugin needs to be changed to 4:

  grep -A 4 "^Slave Interface: ${if}" ${PROCDIR}/${BONDINGIF} | grep "Link Failure Count:" | cut -d " " -f 4

[Will Bryant (willbryant)]

Could this please be applied? It's a a pretty trivial patch, just need to change the one number.