Discovery plugin additions

[shd]

here's some additions to discovery plugin:

1. description to discovered host set as "hostname sysname". that's much better for big networks.
2. virtual interfaces are not graphed by default. we don't need to graph vlan, null and loopback interfaces by default. if we need them, we can add them later.
3. only interfaces with descriptions are graphed. i think it's better that way.

it would be nice if someone will make theese addons as options to discovery plugin, i only made them as default actions. patch attached.

[niobe]

Interesting, how do I run the patch though?

I would like to see a "Do Not Graph" option to Discovery.

I am currently deleting the 15,000 graphs Discovery created that I didn't want it too - I only wanted it to add devices to the host table. Lost 3 hours of data since the poller can't run until they're gone...ah well