Try to prevent any collisions between upgrades and letsencrypt certificate updates

src/freedombone-utils-git

         git branch -D "$2"
         # check out the new branch
         if ! git checkout "$2" -b "$2"; then
+            if [ -f /tmp/.upgrading ]; then
+                rm /tmp/.upgrading
+            fi
             echo $"Unable to checkout $1 $2"
             exit 72357
         fi

src/freedombone-utils-web

     # a secondary script keeps trying to renew after a failure
     { echo '#!/bin/bash';
       echo '';
+      echo 'if [ -f /tmp/.upgrading ]; then';
+      echo '    exit 0';
+      echo 'fi';
+      echo '';
       echo "PROJECT_NAME='${PROJECT_NAME}'";
       echo "COMPLETION_FILE=\$HOME/\${PROJECT_NAME}-completed.txt";
       echo '';
       echo "}')";
       echo "        ADMIN_EMAIL_ADDRESS=\$ADMIN_USERNAME@\$HOSTNAME";
       echo '        for d in /etc/letsencrypt/live/*/ ; do';
+      echo '';
+      echo '            if [ -f /tmp/.upgrading ]; then';
+      echo '                exit 0';
+      echo '            fi';
+      echo '';
       echo -n "            LETSENCRYPT_DOMAIN=\$(echo \"\$d\" | ";
       echo -n "awk -F '/' '{print ";
       echo -n "\$5";