Clear the session on pages that don't use the spam field

[rabauss]

Since all features of this extension are part of the contao core - this extension should be marked abandoned, shouldn't it?

P.S. If you enable the form field for antispam, a session is created which prevents the caching!

[ausi]

It doesn’t work exactly the same as the core implementation does, so I don’t think it’s obsolete.

P.S. If you enable the form field for antispam, a session is created which prevents the caching!

This could also be a benefit for repelling some spam bots. But I guess we should clear the session on pages that don’t use the spam field so that the cache can be used again afterwards.