feat: request DHCP classless static routes (option 121)

Add -O 121 flag to all udhcpc calls in both S30eth and S30wifi.
This allows network administrators to push classless static routes
to the device for isolated network segments.

Author: winstar0070

kvmapp/system/init.d/S30eth

@@ -43,15 +43,15 @@ start() {
         done < /boot/eth.nodhcp
 
         ip a show dev eth0 | grep inet > /dev/null || {
-            udhcpc -i eth0 -t 3 -T 1 -A 5 -b $HOSTNAME_OPT -p /run/udhcpc.eth0.pid &>/dev/null
+            udhcpc -i eth0 -t 3 -T 1 -A 5 -b -O 121 $HOSTNAME_OPT -p /run/udhcpc.eth0.pid &>/dev/null
             ip a show dev eth0 | grep inet > /dev/null
         } || {
             inet=$RESERVE_INET
             addr=${inet%/*}
             ip a add "$inet" brd + dev eth0
         } || exit 1
     else
-        udhcpc -i eth0 -t 10 -T 1 -A 5 -b $HOSTNAME_OPT -p /run/udhcpc.eth0.pid &
+        udhcpc -i eth0 -t 10 -T 1 -A 5 -b -O 121 $HOSTNAME_OPT -p /run/udhcpc.eth0.pid &
     fi
 }
 

kvmapp/system/init.d/S30wifi

@@ -77,7 +77,7 @@ start() {
     wpa_passphrase "$ssid" "$pass" >>/etc/wpa_supplicant.conf
     wpa_supplicant -B -i wlan0 -c /etc/wpa_supplicant.conf
     if [ ! -e /boot/wifi.nodhcp ]; then
-        (udhcpc -i wlan0 -t 10 -T 1 -A 5 -b $HOSTNAME_OPT -p /run/udhcpc.wlan0.pid) &
+        (udhcpc -i wlan0 -t 10 -T 1 -A 5 -b -O 121 $HOSTNAME_OPT -p /run/udhcpc.wlan0.pid) &
     fi
 }