tweak version # (doc got backported prematurely) and fix typos.

      default behavior in 2.4.0 through 2.4.3, and the flag to restore it is

      available Apache HTTP Server 2.4.4 and later.</p>

      </dd>

      </dl>

      <dt><code>IgnoreContextInfo</code></dt>

      <dd>

      <p>In versions 2.4.13 and later, when a relative substitution is made

         in directory (htaccess) context and <directive module="mod_rewrite"

         >RewriteBase</directive> has not been set, this module uses some

         extended URL and filesystem context information to change the 

         relative substitution back into a URL. Modules such as 

         <module>mod_userdir</module> and <module>mod_alias</module>

         supply this extended context info.  This option disables the behavior

         introduced in 2.4.13 and should only be set if all of the conditions 

         above are present and a substituion has an unexpected result.  </p>

      </dd>

      </dl>

</usage>

</directivesynopsis>

               <directive>RewriteRule</directive>, suffixed by the relative 

               substitution is also valid as a URL path on the server 

               (this is rare).</li>

          <li> In Apache HTTP Server 2.4.13 and later, this directive may be 

                omitted when the request is mapped via 

                <directive module="mod_alias">Alias</directive>

                or <module>mod_userdir</module>.</li>

      </ul>

<p> In the example below, <directive>RewriteBase</directive> is necessary

    directory under the document root.</p>

<highlight language="config">

DocumentRoot /var/www/example.com

Alias /myapp /opt/myapp-1.2.3

AliasMatch ^/myapp /opt/myapp-1.2.3

<Directory /opt/myapp-1.2.3>

    RewriteEngine On

    RewriteBase /myapp/

    RewriteRule ^index\.html$  welcome.html 

</Directory>

</highlight>

</usage>

</directivesynopsis>