svn: added example to check version of loaded mod_dav_svn module.

docs/admin/svn-http.rst

@@ -18,7 +18,8 b' Prerequisites'
 .. tip::
 
    We recommend using Wandisco repositories which provide latest SVN versions
-   for most platforms.
+   for most platforms. If you skip this version you'll have to ensure the Client version
+   is compatible with installed SVN version which might differ depending on the operating system.
    Here is an example how to add the Wandisco repositories for Ubuntu.
 
     .. code-block:: bash
@@ -76,6 +77,12 b' Once installed you need to enable ``dav_'
     LoadModule headers_module     modules/mod_headers.so
     LoadModule authn_anon_module  modules/mod_authn_anon.so
 
+.. tip::
+
+   To check the installed mod_dav_svn module version, you can use such command.
+
+   `strings /usr/lib/apache2/modules/mod_dav_svn.so | grep 'Powered by'`
+
 
 Configuring Apache Setup
 ========================