f161e121fd
This also involves modifications of the network update routines as the modification of metadata does not trigger the callbacks used for this purpose. Instead the tool manually forces updates to networks around the node. Currently we cannot detect the digging of a node with specific metadata associated, thus we currently need to trigger network updates for ALL nodes digged which can incur much lag for heavy recalculations.
This is the sparktech modification for the game minetest. do *not* enable sparkdebug unless you want to debug (allows arbitary lua code and stuff) targeting minetest 5ish