[Xymon] Patch: filelist option for graph page

Hi,

This patch enhances the graph creation pages and add a filelist option. This option can be used to limit what will be graphed. When the graph has FXPATTERN it will limit the matched files to what's specified in the filelist option. This is handy if you want to generate custom graphs.

Example: this will create a network graph of only device eth0 showgraph.sh?host=host01service=ifstat&filelist=eth0&action=menu

Stef