[TYPO3-core] RFC: Add user function support to Constant Editor

[Dmitry Dulepov [typo3]]

Ingo Renner wrote:
> ok, then the middle way would be to not render the form but show a 
> message that there're options which become available once the extension 
> is installed. Can we agree on this?

Yes, fine with me!

-- 
Dmitry Dulepov
TYPO3 freelancer / TYPO3 core team member
Web: http://typo3bloke.net/
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