Item2520: Reading form field values from topic happens with tainted topic name

Editing a topic with a form where the form has e.g. a select with values defined in a topic.

This causes a taint error if taint asserts are enabled (developer thing).

It turns out the reading of the topic name from the form results in a tainted topic name.

However at some point we normallize the topic / web AND we check that the topic exists, so we have a pretty good check that the data is valid.

This means that we can untaint the variable.

I am checking this in.

-- KennethLavrsen - 22 Dec 2009