[Tagging] landuse=aquaculture with wateruse=aquaculture

[Warin]

Hi,

There are a number of instances of the tag landuse=aquaculture present 
on water.

Specifically landuse=aquaculture with produce=oyster.


I think these would be better tagged wateruse=aquaculture.

The landuse tag may have been used as that is what is available on the 
wiki and it may get rendered.

Oysters are not the only aquaculture activities taking place on water 
... fish farms too where the fish are restrained in nets.

e.g. https://theunderlined.wordpress.com/2013/05/01/mediterranean-tuna-farm/

And some crustaceans too.


While some aquaculture does take place on land (e.g. in tanks) .. the 
larger installations are usually in water (sea, river, lake or dam).


Thoughts?