Add release information for 6.0.8, 6.5.2 and 6.6.1

R1/source/releases/rel6.0.8.rst

+.. _rel6.0.8:
+
+Varnish Cache 6.0.8
+===================
+
+* Source download :download:`varnish-6.0.8.tgz <varnish-6.0.8.tgz>`
+
+* SHA256=5dd245b02840b9cd7ef8b10665d8172ef902dcc006f54f2c6801cbd71d1c68fe
+
+* Varnish Cache 6.0.8 is a security fix of the Varnish Cache 6.0 LTS
+  series, related to :ref:`VSV00007`. All users should, as soon as
+  possible, upgrade to a secure version, either 6.0.8, 6.6.1 or 6.5.2.
+
+* This release in the 6.0 LTS branch contains several bug fixes as well as
+  feature backports. More information is available in the changelog.
+
+More information:
+
+* `changes.rst entry for 6.0.8 <https://github.com/varnishcache/varnish-cache/blob/6.0/doc/changes.rst#varnish-cache-608-2021-07-13>`_
+
+* `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>`_

R1/source/releases/rel6.5.2.rst

+.. _rel6.5.2:
+
+Varnish Cache 6.5.2
+===================
+
+* Source download :download:`varnish-6.5.2.tgz <varnish-6.5.2.tgz>`
+
+* SHA256=5d522d5c19b8cb12e12fb514f30016af2358a637bbfdc3255a9a330485602f10
+
+Varnish Cache 6.5.2 is a security fix of 6.5, related to :ref:`VSV00007
+<VSV00007>`.  All user should, as soon as possible, upgrade to a secure
+version, either 6.0.8, 6.6.1 or 6.5.2.
+
+More information:
+
+* List of most important `Changes in 6.5.2 <https://varnish-cache.org/docs/6.5/whats-new/changes-6.5.html>`_
+* Help on `Upgrading to Varnish 6.5.2 <https://varnish-cache.org/docs/6.5/whats-new/upgrading-6.5.html>`_
+* `Full changes.rst entry for 6.5.2 <https://github.com/varnishcache/varnish-cache/blob/6.5/doc/changes.rst#varnish-cache-652-2021-07-13>`_
+
+For installation instructions including information about cloud images see
+`the Varnish Installation Manual </docs/trunk/installation/index.html>`_
+
+We recommend using the manual installation procedure available at:
+https://packagecloud.io/varnishcache/varnish65/install#manual

R1/source/releases/rel6.6.1.rst

+.. _rel6.6.1:
+
+Varnish Cache 6.6.1
+===================
+
+* Source download :download:`varnish-6.6.1.tgz <varnish-6.6.1.tgz>`
+
+* SHA256=ab1a6884332731f983c8dab675c636deb3883a206c8a0127a7c663af2422e628
+
+Varnish Cache 6.6.1 is a security fix of 6.6, related to :ref:`VSV00007
+<VSV00007>`.  All user should, as soon as possible, upgrade to a secure
+version, either 6.0.8, 6.6.1 or 6.5.2.
+
+More information:
+
+* List of most important `Changes in 6.6.1 <https://varnish-cache.org/docs/6.6/whats-new/changes-6.6.html>`_
+* Help on `Upgrading to Varnish 6.6.1 <https://varnish-cache.org/docs/6.6/whats-new/upgrading-6.6.html>`_
+* `Full changes.rst entry for 6.6.1 <https://github.com/varnishcache/varnish-cache/blob/6.6/doc/changes.rst#varnish-cache-661-2021-07-13>`_
+
+For installation instructions including information about cloud images see
+`the Varnish Installation Manual </docs/trunk/installation/index.html>`_
+
+We recommend using the manual installation procedure available at:
+https://packagecloud.io/varnishcache/varnish66/install#manual