[mrtg] weard options [xx] : flag isue.

[Alex van den Bogaerdt]

> 2:
> Messuring temp works good, but somewhere it goes wrong in the Yline
> Temperature °C is nice set, but in the graph a rectal x shows up.
> i guess i am missing a font,not a big deal, that is a fix for later.

try charset = utf-8