[Observium] adjusting bandwidth graphs to what the client is paying for

Hi,

Just checking out the software for the first time and really liking it. We are using PRTG now and of the things we like about it is per interface we are monitoring, we can set the max x-axis value. It helps our tech's to know what speed Internet connection a client is paying for. We will hand off a 100Mbps interface to the client, but if they are only paying for 20Mbps, we will shape the traffic down to 20Mbps on the router. When you look at the percent graph in Observium, it's based on a 100Mbps max possible speed instead of 20Mbps.

Thanks!