Version 4.7.0, compatible with Varnish 6.6, and with miscellaneous bu…

…ild fixes

version 4.6.0, bugfix error handling, compatible with Varnish 6.5

version 4.5.0, re-attach shared memory when the Varnish management pr…

…ocess restarts

Version 4.4.0, packages for Varnish 6.2

version 4.3.1, builds packages for Varnish 6.1

version 4.3.0, builds packages for Varnish 6.0

version 4.2.1, strictly requires Varnish 5.2.x

v4.2, requires Varnish >= 5.2.0, published as RPM

Set version 4.1, and require Varnish versions 4.1.x or 5.0.0.

.gitignore make check products