title: How to install mod_proxy_hcheck module/extension for apache2
body: <p>How to install mod_proxy check module/extension for apache2 ? I want to use all the latest mod_proxy ProxyPass parameters. Currently it is throwing compilation error saying</p>
  
  <pre><code>AH00526: Syntax error on line 8 of /etc/apache2/conf-extra/httpd-proxy-balancer.conf:
  BalancerMember unknown Worker parameter
  Action 'configtest' failed.
  The Apache error log may have more information.
  </code></pre>