Remove old file on upgrade

src/freedombone-utils-upgrade

@@ -33,13 +33,13 @@ UPGRADE_SCRIPT_NAME="${PROJECT_NAME}-upgrade"
 
 function create_upgrade_script {
     if [ -f /usr/local/bin/${PROJECT_NAME}-upgrade ]; then
-	cp /usr/local/bin/${PROJECT_NAME}-upgrade /etc/cron.weekly/$UPGRADE_SCRIPT_NAME
+        cp /usr/local/bin/${PROJECT_NAME}-upgrade /etc/cron.weekly/$UPGRADE_SCRIPT_NAME
     else
-	cp /usr/bin/${PROJECT_NAME}-upgrade /etc/cron.weekly/$UPGRADE_SCRIPT_NAME
+        cp /usr/bin/${PROJECT_NAME}-upgrade /etc/cron.weekly/$UPGRADE_SCRIPT_NAME
     fi
 
     if grep -Fxq "create_upgrade_script" $COMPLETION_FILE; then
-	return
+        return
     fi
 
     apt-get -y install unattended-upgrades
@@ -49,10 +49,10 @@ function create_upgrade_script {
 
 function upgrade_installation {
     if [ ! -f $COMPLETION_FILE ]; then
-	return
+        return
     fi
     if grep -Fxq "upgrade_installation" $COMPLETION_FILE; then
-	return
+        return
     fi
 
     # upgrade from previous versions to stockholm
@@ -66,6 +66,10 @@ function upgrade_installation {
     sed -i 's|install_tox_node|install_tox|g' $COMPLETION_FILE
     sed -i 's|intrusion_detection|install_tripwire|g' $COMPLETION_FILE
 
+    if [ -f /usr/local/bin/zeronetavahi ]; then
+        rm /usr/local/bin/zeronetavahi
+    fi
+
     echo 'upgrade_installation' >> $COMPLETION_FILE
 }