Put this here too
<dt><module>mod_http2</module> (available since 2.4.17)</dt>
<dd>Support for the HTTP/2 transport layer.</dd>
+ <dt><module>mod_proxy_hcheck</module> (available since 2.4.21)</dt>
+ <dd>Support independent dynamic health checks for remote proxiy backend servers.</dd>
+
</dl>
</section>
