It does the following:

- Detects links outside of Freenet and links with embedded question mark
- Detects JavaScript
- Detects embedded objects/code

if any of the above are detected, a warning page is displayed.  The user
can go ahead and retrieve the page anyways.

Of course, all pages with JavaScript pseudo-updating tricks now get the
warning page.  A future improvement is to find a simple scheme to allow
some very rigidly defined JavaScript through for the pseudo-updating to
happen without warnings.

Also, since this is worthless if the detectors fail, it would be nice
if the regular expressions could be reviewed/criticized...

The bulk of the code is in Freenet/contirb/fproxy/filter.

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Dev Random
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