2022-03-04-add-varnish-clear-to-cache-clear.md

title	issue
Add varnish clear to cache:clear	NEXT-19744

Storefront

• Added new service \Shopware\Storefront\Framework\Cache\ReverseProxy\ReverseProxyCacheClearer to clear the cache of the external reverse proxy when the cache is cleard in the cli.
  • The ban url can be configured in storefront.reverse_proxy.purge_all_urls default is ["/"]