Bedrock placement about mchawk HOT 2 OPEN

New requirements:

• let OPs place bedrock
• Bug: Bedrock can be destroyed if the bedrock is between the cuboid range
• in general permissions needed
• a central place to check place permission

from mchawk.

Also, the central PlaceBlock function, when written, should check all protocols for valid blocks and check client->CanBuild(). There should also be a client->CanPlaceBlock() that checks if a player has permission to place a block; ideally, this would be done after permissions are rewritten in C++ and there's some kind of canPlaceBedrock option or similar--a workaround would be acceptable, however.

from mchawk.