Update doc as per latest feedback.

README.rst

@@ -21,14 +21,14 @@ Installation and usage
 ======================
 
 If you already have it installed and want to quickly configure it, copy the
-``example.cfg`` to ``$XDG_CONFIG_HOME/vdirsyncer/config`` (normally
-``~/.config/vdirsyncer/config``)
-and edit it.
+``example.cfg`` to ``~/.vdirsyncer/config`` [1]_ and edit it.
 
 If that method doesn't work for you or you want a deeper understanding of what
 you just did, check out `the tutorial
 <https://vdirsyncer.readthedocs.org/en/latest/tutorial.html>`_.
 
+.. [1] The configuration file can also be placed in ``$XDG_CONFIG_HOME/vdirsyncer/config`` (normally ``~/.config/vdirsyncer/config``) for XDG-Basedir spec compliance.
+
 Donations
 =========
 

docs/tutorial.rst

@@ -33,10 +33,14 @@ Configuration
     - Take a look at the :doc:`problems` page if anything doesn't work like
       planned.
 
-By default, *vdirsyncer* looks for its configuration file at
-``$XDG_CONFIG_HOME/vdirsyncer/config`` (normally
-``~/.config/vdirsyncer/config``) and ``~/.vdirsyncer/config``. You can use the
-``VDIRSYNCER_CONFIG`` environment variable to change this path.
+By default, *vdirsyncer* looks for its configuration file in the following
+locations:
+
+- The file pointed to by the ``VDIRSYNCER_CONFIG`` environment variable.
+- ``~/.vdirsyncer/config``.
+- ``$XDG_CONFIG_HOME/vdirsyncer/config``, which is normally
+  ``~/.config/vdirsyncer/config``. This is XDG-Basedir compliant, and should
+  help keep your ``$HOME`` clean.
 
 The config file should start with a :ref:`general section <general_config>`,
 where the only required parameter is ``status_path``. The following is a