[RCU] plugin configuration override and rpm

Hello,

I am using Fedora17 and a rpm version of roundcube.

On this rpm packaging, configuration main.inc.php and db.inc.php are both stored in /etc/roundcubemail/

Also, I use the managesieve plugin and I have to modify the plugin port from 2000 to 4190 in the plugin configuration setting (/usr/share/roundcubemail/plugins/managesieve/config.inc.php)

As the RPM package updates from time to time, the config.inc.php gets overridden.

I have without success to set the port in the main.inc.php.

Is there a standard way or a best practice to set $rcmail_config['managesieve_port'] = 4190; in /etc/roundcube/..... that allows to override any previous setting?

Thanks,