Add 6.0.11 landing page

R1/source/releases/rel6.0.11.rst

+.. _rel6.0.11:
+
+Varnish Cache 6.0.11
+====================
+
+* Source download `varnish-6.0.11.tgz </downloads/varnish-6.0.11.tgz>`_
+
+* SHA256=515900dbeb47ffd30eb39065cae033167983ecf9bd03a9435a273607e1d128db
+
+Varnish Cache 6.0.11 is a security fix of the Varnish Cache 6.0 LTS
+series, related to :ref:`VSV00011`. All users should, as soon as possible,
+upgrade to a secure version, either 6.0.11, 7.2.1 or 7.1.2.
+
+Complete list of changes in this release is available in the changelog.
+
+More information:
+
+* `changes.rst entry for 6.0.11 <https://github.com/varnishcache/varnish-cache/blob/6.0/doc/changes.rst#varnish-cache-6011-2022-11-08>`_
+
+* `List of changes and other good reasons to update to 6.0 </docs/6.0/whats-new/changes-6.0.html>`_
+
+* `Upgrading </docs/6.0/whats-new/upgrading-6.0.html>`_
+
+For installation instructions including information about cloud images see
+`the Varnish Installation Manual </docs/trunk/installation/index.html>`_