When enabled the dnsmasq DHCP server allocates the IP addresses sequentially
starting from the lowest available IP address.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46211 3c298f89-4303-0410-b956-a3cf2f4a3e73