Villagers

~~WIP - Not public~~

Villagers have a handful of unique settings on this server. To change them for the needs of the server and to aid in server performance.

They never lose professional once gained.
Placing the same or different work block will not change their trades or professions. This is to prevent cheesing of trades.
Villagers will follow emerald blocks.
This is similar to how animals follow food. You can use this to lure villagers to safety.
If villagers are in a 1x1 space, they will tick less often.
This is to aid in server performance
Curing no longer stacks
This is to prevent exploitation, and is considered a bug by many.
Infection rate has 50% chance of killing a villager
This is the same rate as normal difficulty.

Some trades are changed to diamonds.
Many trades have minimum prices to prevent discounts from being ridiculously effective.
Some buying trades have been increased - or had their uses dropped - to discourage large scale farms.

Do not keep villagers within minecarts or boats
This will aid in server performance.
Do not have hundreds of villagers in the same area
Villagers are very heavy. This not only affects server performance but also client performance.

All villager trading rules need to comply to the rules.