Important: If you are not running 4.1.9r1 (released November 30th 2017) or newer, make sure you read the associated information on upgrading to 4.1.9r1 before you upgrade to 4.1.11r3.
This release is a bug fix release, and is recommended for all users of Varnish Cache Plus 4.1.x.
This release contains a single fix: The varnishncsa will now also log lines when the backend produces responses with bad HTTP.
See the change log for details on this and previous releases.