Execute confdir only for 24 and newer versions

getdomains-install.sh

@@ -327,6 +327,8 @@ fi
 }
 
 dnsmasqconfdir() {
+    openwrt_release=$(cat /etc/openwrt_release | grep -Eo [0-9]{2}[.][0-9]{2}[.][0-9]* | cut -d '.' -f 1 | tail -n 1)
+    if [ $openwrt_release -ge 24 ]; then
         if uci get dhcp.@dnsmasq[0].confdir | grep -q /tmp/dnsmasq.d; then
             printf "\033[32;1mconfdir alreadt set\033[0m\n"
         else
@@ -334,7 +336,9 @@ dnsmasqconfdir() {
             uci set dhcp.@dnsmasq[0].confdir='/tmp/dnsmasq.d'
             uci commit dhcp
         fi
+    fi
 }
+
 remove_forwarding() {
     if [ ! -z "$forward_id" ]; then
         while uci -q delete firewall.@forwarding[$forward_id]; do :; done