OBMFULL-5903 Working obm-services logrotate on CentOS.
OBMFULL-6054 Default Roundcube session lifetime of 10 mn.

The issue is that the auto refresh of the unread email badge is set to 5 mn. The
default cookie's lifetime must be long enough that Roundcube can recognize it
and not delete it.
OBMFULL-6054 Warning when the email count couldn't be read.

And yes, the server returns 200 OK when authentication fails.