Merge pull request #6837 from digitalbricklayer/patch-3

Adds varnish 6.x to the list of supported varnish major versions

Author: dobooth

src/guides/v2.3/config-guide/varnish/config-varnish.md

@@ -10,7 +10,7 @@ functional_areas:
 ## Overview of the Varnish solution {#config-varnish-over}
 [Varnish Cache] is an open source web application accelerator (also referred to as an *HTTP accelerator* or *caching HTTP reverse proxy*). Varnish stores (or caches) files or fragments of files in memory; this enables Varnish to reduce the response time and network bandwidth consumption on future, equivalent requests. Unlike web servers like Apache and nginx, Varnish was designed for use exclusively with the HTTP protocol.
 
-Magento 2 supports Varnish 4.x and 5.x
+Magento 2 supports Varnish 4.x, 5.x and 6.x
 
 {:.bs-callout-warning}
 We _strongly recommend_ you use Varnish in production. The built-in full-page caching (to either the file system or [database]) is much slower than Varnish, and Varnish is designed to accelerate HTTP traffic.
@@ -36,21 +36,21 @@ Assets cached by Varnish expire at a configurable interval or are replaced by ne
 
 ## Process overview {#config-varnish-process}
 
-This topic discusses how to initially install Varnish with a minimal set of parameters and test that it works. Then you'll export a Varnish configuration from the Magento [Admin](https://glossary.magento.com/admin) and test it again.
+This topic discusses how to initially install Varnish with a minimal set of parameters and test that it works. Then you will export a Varnish configuration from the Magento [Admin](https://glossary.magento.com/admin) and test it again.
 
 The process can be summarized as follows:
 
-1. Install Varnish and test it by accessing any Magento page to see if you're getting HTTP response headers that indicate Varnish is working.
+1. Install Varnish and test it by accessing any Magento page to see if you are getting HTTP response headers that indicate Varnish is working.
 1. Install the Magento software and use the Magento Admin to create a Varnish configuration file.
 1. Replace your existing Varnish configuration file with the one generated by the Admin.
 1. Test everything again.
 
-   If there is nothing in your `<magento_root>/var/page_cache` directory, you've successfully configured Varnish with Magento!
+   If there is nothing in your `<magento_root>/var/page_cache` directory, you have successfully configured Varnish with Magento!
 
 {:.bs-callout-info}
 
 *  Except where noted, you must enter all commands discussed in this topic as a user with `root` privileges.
-*  This topic is written for Varnish on CentOS and Apache 2.2. If you're setting up Varnish in a different environment, some commands are likely different. Consult Varnish documentation for more information.
+*  This topic is written for Varnish on CentOS and Apache 2.4. If you are setting up Varnish in a different environment, some commands may be different. Consult Varnish documentation for more information.
 
 ## Known issues {#config-varnish-issues}