Purge Multiple Varnish Caches when pages are modified.
Multi-Varnish HTTP Purge sends a PURGE request to the URL of a page or post on multiple Varnish instances every time it it modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes.
Varnish is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin does not install Varnish for you. It's expected you already did that.
Not all pages are purged every time, depending on your Varnish configuration. When a post, page, or custom post type is edited, or a new comment is added, only the following pages will purge:
In addition, your entire cache will be purged on the following actions:
I plan on keeping this fork current with any upgrades made to the main Varnish HTTP Purge plugin