[Freeciv-Dev] (PR#2957) is ocean as a function with oceanness read from ruleset

["Karen Yeats via RT" <rt@xxxxxxxxxxxxxx>]

This is almost a patch to make is_ocean and company into functions where
the property of a terrain type being a sort of ocean is read from the
ruleset.

The problem is that I am not super familiar with the nitty gritty of
making different files talk to each other and consequently I haven't
been able to find where I need to put the new dependancies which I
introduce (many more files now need to be able to use functions from
map.c).  I see that at compile time the files in the .deps directories
are made, and these seem to contain the stuff in question, but I don't
see where they are reading their information from.  Could someone please
enlighten me?

I attach the patch anyway for anyone who wishes to see what I have in mind.

oceanfn.diff
Description: oceanfn.diff