[mrtg] Using hrSystemUptime with RouterUptime

[Steve Shipway]

> RouterUptime[test]: public at 192.168.1.1
>
> I get the following error when trying to update graphs:
>
> ERROR: You must specify the location part of the RouterUptime oid for
> non unique targets! (test)

>From the MRTG documentation examples:

RouterUptime[kacisco.comp.edu]: hrSystemUptime.0:public at 194.64.66.250

If you do not give the 'OID:' prefix then it defaults to the normal uptime counter.

Note that the RouterUptime directive is not yet supported by the Routers2 frontend for performance reasons.

Steve