Comment 1 for bug 584531

I opened the file

/usr/lib/pymodules/python2.7/openerp/tools/config.py

There you can see all the correct options used by the configuration (file or arguments)

The correct option seems to be 'xmlrpc_interface' instead of 'interface'. So the documentation has this error and should be fixed. It should say something like

* openerp-server in the upstreams configuration listens by default to *all*
    interfaces. For security reasons, we do restrict it in the Debian packages
    to listen only on localhost. If you need to change this, edit
    /etc/openerp-server.conf and replace 'xmlrpc_interface = localhost' with
    'xmlrpc_interface = <your ip>'.