[Typo3-doc] Extension documenters wanted

[Rainer (Rene) Suthoelder]

> By the way, what is the difference between a extension and a plug-in?

yes, there is: plugins and modules fall into the same category, namely 
extensions.
plugins are such extensions that produce frontend material visible on the 
typo3 generated website (for example tt_news), modules are extensions that 
provide backend functionality (for example the directmail or phpmyadmin).

greets,

rainer