[docs] Missing function createCDATASection

[Peter Hoffmann]

Hy,

is just found a function I was desperately looking for in the
documentation and was only informed about its existence through
google-search:
createCDATASection()

It is implemented in xml.dom.minidom but neither appears as part of the
xml.dom - API nor the xml.dom.minidom difference-documenation.
I assume that others would also be pretty glad to get to know this function.

Thank you,
Peter Hoffmann