Hook names

[xoft]

We might want to consider two hooks, HOOK_RIGHT_CLICK and HOOK_BLOCK_PLACE. The one for rclk is called each time a player rclks; blockplace is called only when that rclk is translated into an actual block being placed. So using a hoe, for example, will trigger rclk, but not blockplace.

For this reason, I'm not inclined to just rename the hook, it needs deeper discussion.