Ability to specify nameservers

src/freedombone-prep

 # The fixed IP address of the Beaglebone Black on your local network
 BBB_FIXED_IP_ADDRESS="192.168.1.55"
 
+# DNS
+NAMESERVER1='213.73.91.35'
+NAMESERVER2='85.214.20.141'
+
 MICROSD_MOUNT_POINT="/media/$USER"
 
 DEBIAN_FILE_NAME="debian-jessie-console-armhf-2014-08-13"
     shift
     MICROSD_MOUNT_POINT="$1"
     ;;
+    # nameserver 1
+    --ns1)
+    shift
+    NAMESERVER1="$1"
+    ;;
+    # nameserver 2
+    --ns2)
+    shift
+    NAMESERVER2="$1"
+    ;;
     *)
     # unknown option
     ;;
 $SUDO sed -i "/iface eth0 inet static/a\    address $BBB_FIXED_IP_ADDRESS" $MICROSD_MOUNT_POINT/$ROOTFS/etc/network/interfaces
 $SUDO sed -i '/iface usb0 inet static/,/    gateway 192.168.7.1/ s/^/#/' $MICROSD_MOUNT_POINT/$ROOTFS/etc/network/interfaces
 
-$SUDO sed -i 's/nameserver.*/nameserver 213.73.91.35/g' $MICROSD_MOUNT_POINT/$ROOTFS/etc/resolv.conf
-$SUDO sed -i '/nameserver 213.73.91.35/a\nameserver 85.214.20.141' $MICROSD_MOUNT_POINT/$ROOTFS/etc/resolv.conf
+$SUDO sed -i "s/nameserver.*/nameserver $NAMESERVER1/g" $MICROSD_MOUNT_POINT/$ROOTFS/etc/resolv.conf
+$SUDO sed -i "/nameserver $NAMESERVER1/a\nameserver $NAMESERVER2" $MICROSD_MOUNT_POINT/$ROOTFS/etc/resolv.conf
 
 # change the motd to show further install instructions
 echo 'Become the root user by typing:' > $MICROSD_MOUNT_POINT/$ROOTFS/etc/motd