usr/share/roundcube
usr/share/dbconfig-common/data/roundcube/install
+usr/share/dbconfig-common/data/roundcube/upgrade/mysql
+usr/share/dbconfig-common/data/roundcube/upgrade/pgsql
+usr/share/dbconfig-common/data/roundcube/upgrade/sqlite
etc/roundcube
var/log/roundcube
var/lib/roundcube/config