SmoothWater

The SmoothWater bugfix is a class override that makes water more aggressive in filling in ocean discontinuities:
 * Water will close in (create a source block) when there's another source block underneath (bug fixed from Minecraft source -- it was checking the current block metadata instead of that for the block below)
 * If there is support below and a source block above with two adjacent sources, it will also fill in (so you can dig out the ocean floor without generating suction.