[RCD] Issues on Updates

I just updated our Roundcube-Stable Installation from 0.8.2 to 0.8.3 via ./bin/installto.sh and found 3 not so good thing in the main.inc.php.

1. The Config-Line for the Useragent:

The old line was: $rcmail_config['useragent'] = 'Roundcube Webmail/'.RCMAIL_VERSION;

installto.sh sets it to:

$rcmail_config['useragent'] = 'Roundcube Webmail/0.8.3';

2. Config-Lines from plugins that must be configure in the main.inc.php

are lost. Here it is the plugin show_additional_headers and the line $rcmail_config['show_additional_headers'] = array('Content-Type', 'Content-Transfer-Encoding', 'User-Agent', 'Mailer', 'X-Mailer', 'X-Newsreader', 'X-Posting-Agent', 'X-Http-User-Agent', 'X-MimeOLE');

3. All user defined comments in the config are lost.