In case you want to change the certificate:
change to
/etc/vmware/ssl
make a backup of rui.crt and rui.key
delete rui.crt and rui.key
copy your own certs to rui.crt and rui.key
Restart the proxy: /etc/init.d/rhttpproxy restart
In case you have trouble re-create the default certs: /sbin/create_certificates