Per-Forum Config
Each forum can enable or disable just in time registration posts. This is done as a checkbox on the forum options tab. If a forum does enable JIT registration, then guests should not have permission to post. This will cause incompatibilities.
Login & Register based Linking
Instead of having to register to link posts with an account, if a user logs into their account posts will be linked to that account.
Notice
Posts display a message telling the poster that they must login or register to confirm their post. A notice is also displayed at the top of the page saying that they must login or register, or their pending posts will be removed.
Automated Post Deletion
JIT Registration posts are kept for 2 hours. A cron runs twice an hour, and any posts older than 2 hours that haven't been associated with an account are deleted.
Session-Based Associated
JIT Registration posts are given a unique ID, used instead of a username, that is linked with a session. This allows multiple posts to be made, across different pages, before registration or login is made. If a user doesn't visit the page for an extended period of time, and their session expires, posts will be lost.
I've tested this extensively, and I've found bugs prior to release which have delayed it. I am happy that this version is mostly bug-free, however there may be bugs. Please do report them!
