2.6.0

• Added: ClearCapable to clear the whole cache in one efficient call. Currently
  supported only by the Symfony HttpCache.
• Allow installing with Httplug 2.0 / PSR-18.

2.5.4

Symfony HttpCache

• Fixed: Avoid regression of 2.5.3: If there are no messages to be dispatched,
  do not throw an exception if the HttpCache is not set.

2.5.3

Symfony HttpCache

• Fixed: Handle HttpCache not available in KernelDispatcher and fix return
  type annotations - if HttpCache is not set, it can't be returned.

2.5.2

Varnish

• Fixed: Remove the xkey header in vcl_deliver if we are not in debug mode
• Do not cleanup the Vary header and keep the user context hash if we are in debug mode

Cache Tagging

• Fixed: Clear the ResponseTagger after we tagged a response. Usually PHP uses
  a new instance for every request. But for example the hash lookup when using
  Symfony HttpCache does two requests in the same PHP process.

2.5.1

• Fixed: MaxHeaderValueLengthFormatter::getTagsHeaderName now actually returns the value.

2.5.0

Cache Tagging

• Added: MaxHeaderValueLengthFormatter to allow splitting cache tag headers into
  multiple headers.

Symfony HttpCache

• Have cache invalidator check for presence of Psr6Store for a better guess
  whether the cache really is TagCapable or not.

2.4.0

Symfony

• Added: CleanupCacheTagsListener to remove the cache tags header from the final
  response that is sent to the client. Add this listener to your cache kernel.

Tagging

• Improved: The ResponseTagger does now remove duplicate tags.

2.3.1

Varnish

• Fixed: Do not preg_quote tags when using xkey. Quoting is only used for BAN
  requests that expect a regular expression. This bug only affected you if you
  use xkey and used characters in your tags that are changed by preg_quote.

2.3.0

ProxyClient

• The HttpProxyClient now accepts an instance of the new Dispatcher interface
  instead of the concrete HttpDispatcher, allowing for more flexibility.

Symfony

• Introduced a new KernelDispatcher for the Symfony proxy that calls the application
  kernel directly instead of executing a full HTTP request.

2.2.1

• more friendly VCL for when std is used in main VCL