disable-feature.pl does not have --virtualmin-mailrelay

when i run ./disable-feature.pl --all-domains --virtualmin-mailrelay

..from the command line...I get a list of the disable-feature.pl commands as "help"
...
[--user name] |
[--all-domains]
[--unix]
[--dir]
[--mail]
[--dns]
[--web]
[--webalizer]
[--ssl]
[--logrotate]
[--mysql]
[--spam]
[--virus]
[--status]
[--webmin]
[--virtualmin-awstats]
[--virtualmin-google-analytics]
[--virtualmin-init]
[--virtualmin-registrar]
[--virtualmin-signup]
[--virtualmin-mailman]
...
And so on.

However - no --virtualmin-mailrelay is listed. Yet it is listed in the API documentation...

http://www.virtualmin.com/documentation/id,virtualmin_api_disable_feature/

CentOS 5.3 x86_64, VM 3.68 Pro

Thanks!