Plugins prüfen nach:
cookie
http://
https://
serendipity_request (oder so)
_session
remote_addr

* Config option to anonymize IPs (simply write $_SERVER['REMOTE_ADDR'] to something else)

* Patch s9y core: Emit warning when the plugin is not installed. Allow user to remove that warning if he doesnt want the plugin.

* Patch s9y core: Create config option that prevents session_start() on the frontend [if possible]