Use resolvconf for dns resolution

src/freedombone-image-customise

 }
 
 configure_networking() {
+    chroot "$rootdir" apt-get -yq install resolvconf
+
     if [[ "$MACHINE" == "beaglebonewifi" ]]; then
         # Allow networking over USB in order to configure the
         # wifi login settings
     fi
 
     # configure DNS
-    resolvconf=$rootdir/etc/resolv.conf
+    resolvconf=$rootdir/etc/resolvconf/resolv.conf.d/head
     echo 'domain localdomain' > $resolvconf
     echo 'search localdomain' >> $resolvconf
     echo "nameserver $NAMESERVER1" >> $resolvconf
     echo "nameserver $NAMESERVER4" >> $resolvconf
     echo "nameserver $NAMESERVER5" >> $resolvconf
     echo "nameserver $NAMESERVER6" >> $resolvconf
+    chroot "$rootdir" resolvconf -u
 
     if [[ $VARIANT != "meshclient" && $VARIANT != "meshusb" ]]; then
         # change the motd to show further install instructions

src/freedombone-utils-config

 
         if grep -q "DEBIAN_REPO" $CONFIGURATION_FILE; then
             read_config_param "DEBIAN_REPO"
-            CHECK_MESSAGE=$"Check your internet connection, /etc/network/interfaces and /etc/resolv.conf, then delete $COMPLETION_FILE, run 'rm -fR /var/lib/apt/lists/* && apt-get update --fix-missing' and run this script again. If hash sum mismatches persist then try setting $DEBIAN_REPO to a different mirror and also change /etc/apt/sources.list."
+            CHECK_MESSAGE=$"Check your internet connection, /etc/network/interfaces and /etc/resolvconf/resolv.conf.d/head, then delete $COMPLETION_FILE, run 'rm -fR /var/lib/apt/lists/* && apt-get update --fix-missing' and run this script again. If hash sum mismatches persist then try setting $DEBIAN_REPO to a different mirror and also change /etc/apt/sources.list."
         fi
     fi
 }

src/freedombone-utils-dns

         return
     fi
 
-    resolvconf=/etc/resolv.conf
+    apt-get -yq install resolvconf
+
+    resolvconf=/etc/resolvconf/resolv.conf.d/head
 
     # allow changes to resolv.conf
     chattr -i $resolvconf
     echo "nameserver $NAMESERVER6" >> $resolvconf
 
     # prevent resolv.conf from changing
-    chattr +i $resolvconf
+    resolvconf -u
 
     mark_completed $FUNCNAME
 }

src/freedombone-utils-onion

     sed -i 's|, domain-name-servers||g' /etc/dhcp/dhclient.conf
 
     # point resolv.conf to tor
-    resolvconf=/etc/resolv.conf
-    chattr -i $resolvconf
+    resolvconf=/etc/resolvconf/resolv.conf.d/head
     echo 'nameserver 127.0.0.1:53' > $resolvconf
-    chattr +i $resolvconf
+    resolvconf -u
 
     mark_completed $FUNCNAME
 }
         /sbin/sysctl -p -q
     fi
 
-    resolvconf=/etc/resolv.conf
-    chattr -i $resolvconf
+    resolvconf=/etc/resolvconf/resolv.conf.d/head
     echo 'domain localdomain' > $resolvconf
     echo 'search localdomain' >> $resolvconf
     echo 'nameserver 127.0.0.1' >> $resolvconf
-    chattr +i $resolvconf
+    resolvconf -u
 
     if ! grep -q "VirtualAddrNetworkIPv4" /etc/tor/torrc; then
         echo 'VirtualAddrNetworkIPv4 10.192.0.0/10' >> /etc/tor/torrc

src/freedombone-utils-setup

 REMOTE_BACKUPS_LOG=/var/log/remotebackups.log
 
 # message if something fails to install
-CHECK_MESSAGE="Check your internet connection, /etc/network/interfaces and /etc/resolv.conf, then delete $COMPLETION_FILE, run 'rm -fR /var/lib/apt/lists/* && apt-get update --fix-missing' and run this script again. If hash sum mismatches persist then try setting $DEBIAN_REPO to a different mirror and also change /etc/apt/sources.list."
+CHECK_MESSAGE="Check your internet connection, /etc/network/interfaces and /etc/resolvconf/resolv.conf.d/head, then delete $COMPLETION_FILE, run 'rm -fR /var/lib/apt/lists/* && apt-get update --fix-missing' and run this script again. If hash sum mismatches persist then try setting $DEBIAN_REPO to a different mirror and also change /etc/apt/sources.list."
 
 # Default diffie-hellman key length in bits
 DH_KEYLENGTH=2048

src/freedombone-utils-wifi

         fi
     done < $WIFI_NETWORKS_FILE
 
-    resolvconf=/etc/resolv.conf
-    chattr -i $resolvconf
     systemctl restart network-manager
     #ifconfig ${WIFI_INTERFACE} up
     ifup $WIFI_INTERFACE