Remove harmless warnings.

When WEBIF, MONITOR, CAMD33, NEWCAMD, PANDORA and RADEGAST are disabled
iptange functions are not called from anywhere and the compiler complains
about:
{{{
  oscam-config-global.c:51:13: warning: 'iprange_fn' defined but not used [-Wunused-function]
  oscam-config-global.c:67:13: warning: 'iprange_free_fn' defined but not used [-Wunused-function]
}}}

These functions are not in the final binary even if they are not
static, so remove the static declaration to stop the compiler
from issuing warnings.

Thanks to Jens Gutsche for making me fix this after I caused it :)

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@8504 4b0bc96b-bc66-0410-9d44-ebda105a78c1