Anti-Spam ACP: apply mod version 1.0.6

[http://nmguse.webfactional.com/forum/viewtopic.php?f=31&t=941]

Included manual patch fix for posting.php on phpBB 3.0.12.
Anti-Spam ACP: extend OC Ban functionality to ban IP (7) and email (permanent) too; use auto-prefixed ban reasons, and provide sensible defaults when the provided reasons are empty
Anti-Spam ACP: don't show OC Ban link in viewtopic so people don't get accidentally bancannoned