docs: updated docs on proxy prefix for nginx and apache

docs/admin/apache-subdirectory.rst

@@ -1,32 +1,33 b''
 .. _apache-sub-ref:
 
 Apache URL Prefix Configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Use the following example to configure Apache to use a URL prefix.
 
 .. code-block:: apache
 
     <Location /<someprefix> > # Change <someprefix> into your chosen prefix
       ProxyPass http://127.0.0.1:5000/<someprefix>
       ProxyPassReverse http://127.0.0.1:5000/<someprefix>
       SetEnvIf X-Url-Scheme https HTTPS=1
     </Location>
 
 In addition to the regular Apache setup you will need to add the following
 lines into the ``rhodecode.ini`` file.
 
+* Above ``[app:main]`` section of the ``rhodecode.ini`` file add the
+  following section if it doesn't exist yet.
+
+.. code-block:: ini
+
+    [filter:proxy-prefix]
+    use = egg:PasteDeploy#prefix
+    prefix = /<someprefix> # Change <someprefix> into your chosen prefix
+
 * In the the ``[app:main]`` section of your ``rhodecode.ini`` file add the
   following line.
 
 .. code-block:: ini
 
     filter-with = proxy-prefix
-
-* At the end of the ``rhodecode.ini`` file add the following section.
-
-.. code-block:: ini
-
-    [filter:proxy-prefix]
-    use = egg:PasteDeploy#prefix
-    prefix = /<someprefix> # Change <someprefix> into your chosen prefix

docs/admin/nginx-url-prefix.rst

@@ -1,33 +1,36 b''
 .. _nginx_url-pre:
 
 Nginx URL Prefix Configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Use the following example to configure Nginx to use a URL prefix.
 
 .. code-block:: nginx
 
     location  /foo {
       rewrite /foo(.*) /$1  break;
       proxy_pass         http://localhost:3200;
       proxy_redirect     off;
       proxy_set_header   Host $host;
     }
 
 In addition to the Nginx configuration you will need to add the following
-lines into the ``rhodecode.ini`` file.
+lines (if they not exist) into the ``rhodecode.ini`` file.
+
+* Above ``[app:main]`` section of the ``rhodecode.ini`` file add the
+  following section if it doesn't exist yet.
+
+.. code-block:: ini
+
+    [filter:proxy-prefix]
+    use = egg:PasteDeploy#prefix
+    prefix = /<someprefix> # Change <someprefix> into your chosen prefix
 
 * In the the ``[app:main]`` section of your ``rhodecode.ini`` file add the
   following line.
 
 .. code-block:: ini
 
     filter-with = proxy-prefix
 
-* At the end of the ``rhodecode.ini`` file add the following section.
 
-.. code-block:: ini
-
-    [filter:proxy-prefix]
-    use = egg:PasteDeploy#prefix
-    prefix = /<someprefix> # Change <someprefix> into your chosen prefix