PCA Puzzle 0.3.3 (door types)

New

• Door types for other mods: a mod can add a new kind of locked door. A link whose lock is that type's name (e.g. "quiz" or "quiz:maths") is opened by the other mod instead of by an item. The PCA Quiz Puzzle connector uses this for quiz doors.
• /puzzle validate checks these doors through the mod that adds them, and their keyholes show that mod's item.
• The Master Key and /puzzle unlock open them as usual.

Changed

• Nothing changes for existing layouts.