I believe Pete had to pull that package from the repos recently because another package, if installed (app-pptpd?) was pulling in Samba4 as a dependency. Maybe he can help and/or let you know what it might become available...or if you're interested in helping beta test, feel free to send a message to developer at clearfoundation dot com.
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The name of the file *must* be the name of the init script with .php extension. For example, rsyslog.php.
Here's an example of one so you can use it as a template to create your own. The only difference I'd suggest is that you hardcode the title since the base language template will get stomped on with updates. Eg.