src/doc/en/installation/troubles.rst: Refer to version-specific installation FAQ instead of outdated wiki faq

Author: Matthias Koeppe

src/doc/en/installation/troubles.rst

@@ -7,7 +7,13 @@ If no binary version is available for your system, you can fallback to
 the :ref:`sec-installation-from-sources` or use one of the alternatives
 proposed at the end of :ref:`installation-guide`.
 
-If you have any trouble, have a look at the
-`FAQ wiki page <http://wiki.sagemath.org/faq#Otherquestions>`_,
-the `SageMath forum <https://ask.sagemath.org/questions/>`_ or
-the `sage-support mailing list <https://groups.google.com/forum/#!forum/sage-support>`_.
+If you have any problems building or running Sage, please take a look
+at the Installation FAQ in the `Sage Release Tour
+<https://wiki.sagemath.org/ReleaseTours>` corresponding to the version
+that you are installing.  It may offer version-specific installation
+help that has become available after the release was made and is
+therefore not covered by this manual.
+
+Also please do not hesitate to ask for help in the `SageMath forum
+<https://ask.sagemath.org/questions/>`_ or the `sage-support mailing
+list <https://groups.google.com/forum/#!forum/sage-support>`_.