Witches can spawn

This was a new game mechanic introduced on the Villager Tweaks Mod.

When the first version of the mod was released, in Minecraft 1.6.2, Witches could only spawn in witch huts. This feature changed that mechanic and allowed Wicthes to spawn on swamps, above ocean level, but only on new moon nights.

After minecraft 1.7.2, the vanilla behavior was changed and Wicthes could spawn anywhere, so this feature was removed from the mod.

Developer note
The reasoning behind this one was pretty obvious. Witches only spawned on huts, but they had to compete with other mob spawn in the same chunks, so a regular player would either never see a Witch or build a farm and never fight them.

That led me to make a post on the minecraft suggestions subreddit and later, implement in the Villager Tweaks mod. This feature was in fact the main reason I started this mod and was the theme of my first banner (below).