[mrtg] Ignoring certain types of interfaces

[Steve Shipway]

> The filter option must be specified before the host, not after.
>
> That allows more than one host to be polled at a time, with different
> options.  I don't know of anyone using that syntax, but that's why it is
> there.

I can't believe I missed this.  Augh.  I suppose I should make a note to add explicit commentary on this behaviour in the manual...

Thanks for stepping in and sorting us out!

Steve