If we're being paranoid and quote all the arguments to ipcalc.sh,
it's possible to pass in empty start and range arguments. This
should be handled the same as their being absent.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Link: https://github.com/openwrt/openwrt/pull/15946
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
0037100e12