Configuré un nuevo Vhost para jenkins:
<VirtualHost *:80>
ServerAdmin webmaster@localhost
ServerName ci.company.com
ServerAlias ci
ProxyRequests Off
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyPreserveHost on
ProxyPass / http://localhost:8080/
</VirtualHost>
... que usa proxy y cuando reinicio Apache obtengo un error como este:
Invalid command 'ProxyRequests', perhaps misspelled or defined by a module not included in the server configuration