[wmii] PATCH: Make font for bar configurable separately

Hi,

as the bar contains system information which one might want to see at a quick
glance, a bigger font is good. However, setting a bigger font is only possible
with increasing the overall font - which is not necessarily desirable.

The attached patch from Maik Fischer fixes this by adding a new configuration
item called barfont. It behaves like font in /ctl.

Best regards,
Michael