This provides a link on the denied page to bypass the ban for a few minutes. To be secure it uses a random hashed secret generated at daemon startup. You define the number of seconds the bypass will function for before the deny will appear again.
To allow the link on the denied page to appear you will need to not only change this option but also edit the template.html.
Possible values are:
The same functionality is provided for pages that are virus infected (rather than denied because of content) by the configuration option infectedbypass, with the same possible settings.