Block Strengthener/Tough Blocks

Adds a new item called the Block Strengthener.

The item allows you to right click any block, and make it harder to mine, equivalent to mining fatigue.

Useful on SMP servers where you want to give players a means to protect their base without having explicit claims.

You can use a command to whitelist people who you want to be able to break your blocks easier, and they can do the same for you.

When holding the item, the blocks protected will be highlighted in different colors depending on who protected them.

Green: Your own blocks

Blue: The blocks of someone whose whitelisted you

Red: These blocks will be harder for you to break, since you weren't whitelisted.

The prefix is /toughblocks Operators get a command to slow down the mining of their own blocks