Added ban/unban thread notifications for forum and thread bans.
Added the ability to use minutes in forum and thread bans.
Moved the content used in thread notification posts from file to template to allow customization (changes only affect new posts).
Added cron job to delete expired forum and thread bans (if expired they still get deleted when the user visits the forum/thread in which has been banned). The cron has been added to clear the public ban list from expired bans where banned users haven't visited the board in while.
Bugs Fixed
Potential error in thread view with guest/invalid user.
Not displaying the lift ban option when "Display ban details" is disabled.