function to remove hubzilla

src/freedombone-app-hubzilla

 HUBZILLA_COMMIT='2d79e75788aa71664a379c4cea0b6bfe3ab87ad0'
 HUBZILLA_ADDONS_COMMIT='67b40c7a40f328a93ee030eb15e9e1261f3cba64'
 
+function remove_hubzilla {
+	if ! grep -Fxq "install_hubzilla" $COMPLETION_FILE; then
+		return
+	fi
+	nginx_dissite $HUBZILLA_DOMAIN_NAME
+	if [ -d /var/www/$HUBZILLA_DOMAIN_NAME ]; then
+		rm -rf /var/www/$HUBZILLA_DOMAIN_NAME
+	fi
+	if [ -f /etc/nginx/sites-available/$HUBZILLA_DOMAIN_NAME ]; then
+		rm /etc/nginx/sites-available/$HUBZILLA_DOMAIN_NAME
+	fi
+	function_check drop_database
+	drop_database hubzilla
+	sed -i '/install_hubzilla/d' $COMPLETION_FILE
+	sed -i '/Hubzilla /d' $COMPLETION_FILE
+}
+
 function install_hubzilla {
 	if [[ $SYSTEM_TYPE == "$VARIANT_CLOUD" || $SYSTEM_TYPE == "$VARIANT_MAILBOX" || $SYSTEM_TYPE == "$VARIANT_CHAT" || $SYSTEM_TYPE == "$VARIANT_WRITER" || $SYSTEM_TYPE == "$VARIANT_MEDIA" || $SYSTEM_TYPE == "$VARIANT_DEVELOPER" || $SYSTEM_TYPE == "$VARIANT_MESH" ]]; then
 		return
 		return
 	fi
 
-    function_check install_mariadb
+	function_check install_mariadb
 	install_mariadb
 
-    function_check get_mariadb_password
-    get_mariadb_password
+	function_check get_mariadb_password
+	get_mariadb_password
 
-    function_check repair_databases_script
-    repair_databases_script
+	function_check repair_databases_script
+	repair_databases_script
 
 	apt-get -y install php5-common php5-cli php5-curl php5-gd php5-mysql php5-mcrypt git
 	apt-get -y install php5-dev imagemagick php5-imagick
 		echo "Hubzilla onion domain:${HUBZILLA_ONION_HOSTNAME}" >> $COMPLETION_FILE
 	fi
 
-    function_check get_mariadb_hubzilla_admin_password
+	function_check get_mariadb_hubzilla_admin_password
 	get_mariadb_hubzilla_admin_password
 	if [ ! $HUBZILLA_ADMIN_PASSWORD ]; then
 		if [ -f $IMAGE_PASSWORD_FILE ]; then
 		chmod 600 /home/$MY_USERNAME/README
 	fi
 
-    function_check create_database
+	function_check create_database
 	create_database hubzilla "$HUBZILLA_ADMIN_PASSWORD"
 
 	if ! grep -q "$HUBZILLA_PATH" /etc/crontab; then
 		echo "12,22,32,42,52 * *   *   *   root cd $HUBZILLA_PATH; /usr/bin/timeout 500 /usr/bin/php include/poller.php" >> /etc/crontab
 	fi
 
-    function check add_ddns_domain
+	function check add_ddns_domain
 	add_ddns_domain $HUBZILLA_DOMAIN_NAME
 
 	if [[ $ONION_ONLY == "no" ]]; then
-	    function_check nginx_http_redirect
+		function_check nginx_http_redirect
 		nginx_http_redirect $HUBZILLA_DOMAIN_NAME
 		echo 'server {' >> /etc/nginx/sites-available/$HUBZILLA_DOMAIN_NAME
 		echo '    listen 443 ssl;' >> /etc/nginx/sites-available/$HUBZILLA_DOMAIN_NAME
 		echo '}' >> /etc/nginx/sites-available/$HUBZILLA_DOMAIN_NAME
 	fi
 
-    function_check configure_php
+	function_check configure_php
 	configure_php
 
-    function_check create_site_certificate
+	function_check create_site_certificate
 	create_site_certificate $HUBZILLA_DOMAIN_NAME 'yes'
 
 	if [ ! -d $HUBZILLA_PATH/view/tpl/smarty3 ]; then
 	function_check backup_databases_script_header
 	backup_databases_script_header
 
-    function_check backup_database_local
+	function_check backup_database_local
 	backup_database_local hubzilla
 
 	chown -R www-data:www-data $HUBZILLA_PATH
 
-    function_check nginx_ensite
+	function_check nginx_ensite
 	nginx_ensite $HUBZILLA_DOMAIN_NAME
 
 	# initialize the database