Allow dns for onion only installs

src/freedombone-config

         echo "ENABLE_BABEL=$ENABLE_BABEL" >> $CONFIGURATION_FILE
     fi
     echo "DEBIAN_REPO=$DEBIAN_REPO" >> $CONFIGURATION_FILE
-    echo "NAMESERVER1=$NAMESERVER1" >> $CONFIGURATION_FILE
-    echo "NAMESERVER2=$NAMESERVER2" >> $CONFIGURATION_FILE
+    if [ $NAMESERVER1 ]; then
+        echo "NAMESERVER1=$NAMESERVER1" >> $CONFIGURATION_FILE
+    fi
+    if [ $NAMESERVER2 ]; then
+        echo "NAMESERVER2=$NAMESERVER2" >> $CONFIGURATION_FILE
+    fi
     if [ $WIKI_TITLE ]; then
         echo "WIKI_TITLE=$WIKI_TITLE" >> $CONFIGURATION_FILE
     fi
 
     FREEDNS_MESSAGE=$"Please enter the FreeDNS code for this domain.\n\nThe code can be found by going to https://freedns.afraid.org, selecting 'Dynamic DNS' and then opening 'Wget example'. The code will consist of letters and numbers and be between the ? and = characters."
 
-    dialog --title $"Freedombone" --msgbox $"Welcome to the Freedombone interactive installer. Communications freedom is only a short time away.\n\nEnsure that you have your domain and dynamic DNS settings ready.\n\nFor more information please visit $FREEDOMBONE_WEBSITE or send a Bitmessage to $FREEDOMBONE_BITMESSAGE" 15 50
+    if [[ $ONION_ONLY == "no" ]]; then
+        INITIAL_MESSAGE=$"Welcome to the Freedombone interactive installer. Communications freedom is only a short time away.\n\nEnsure that you have your domain and dynamic DNS settings ready.\n\nFor more information please visit $FREEDOMBONE_WEBSITE or send a Bitmessage to $FREEDOMBONE_BITMESSAGE"
+    else
+        INITIAL_MESSAGE=$"Welcome to the Freedombone interactive installer. Communications freedom is only a short time away.\n\nWeb sites created will only be viewable within a Tor browser.\n\nFor more information please visit $FREEDOMBONE_WEBSITE or send a Bitmessage to $FREEDOMBONE_BITMESSAGE"
+    fi
+
+    dialog --title $"Freedombone" --msgbox "$INITIAL_MESSAGE" 15 50
 
     data=$(tempfile 2>/dev/null)
     trap "rm -f $data" 0 1 2 5 15
         DEBIAN_REPO='ftp.de.debian.org'
     fi
 
-    if [[ $MINIMAL_INSTALL == "no" ]]; then
+    if [[ $MINIMAL_INSTALL == "no" && $ONION_ONLY == "no" ]]; then
         data=$(tempfile 2>/dev/null)
         trap "rm -f $data" 0 1 2 5 15
         dialog --backtitle $"Freedombone Configuration" \
         NAMESERVER2='213.73.91.35'
     fi
 
-    if [[ $SYSTEM_TYPE != "$VARIANT_MESH" ]]; then
+    if [[ $SYSTEM_TYPE != "$VARIANT_MESH" && $ONION_ONLY == "no" ]]; then
 
         data=$(tempfile 2>/dev/null)
         trap "rm -f $data" 0 1 2 5 15
         save_configuration_file
     fi
 
-    if [[ $MINIMAL_INSTALL == "no" ]]; then
+    if [[ $MINIMAL_INSTALL == "no" && $ONION_ONLY == "no" ]]; then
         SET_STATIC_IP="no"
         dialog --title $"Static local IP address" \
                --backtitle $"Freedombone Configuration" \