how to set the http access only (NO SSL/TLS) to roundcube webmail?

==== Required information ====
- iRedMail version: 0.8.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: OpenSuse 12.1
- Related log if you're reporting an issue:
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To access the mailboxes to the webmail I would NOT USE the SSL/TLS (https) but the default 80 (http), what is the correct setting.
thanks