Include Junk folder with Inbox in ZCS 8.0.0

I found a solution provided to include junk folder with inbox where pop3 client can download the mails in junk folder.

Code:

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http://bugzilla.zimbra.com/show_bug.cgi?id=21062

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So I'm confused on how to use this command, this applies to single user or how the full command would be?

Code:

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zimbraPrefPop3IncludeSpam

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To be honest, I'm interested in this feature, too.

Is there anything documented? Can we use it from command line?
Anyone out there who has some information...

Joerg