Many displayed mapgen params are wrong

[Wuzzy2]

Displayed mapgen params for v7 floatlands are wrong:

mg_flags = mountains, ridges, caverns

This is wrong. mountains and ridges and caverns are invalid flags for mg_flags, they must go into mgv7_spflags instead. Also, the floatlands flag is missing. So it should be:

mgv7_spflags = mountains, ridges, caverns, floatlands

For v7, it's the same, it should be:

mgv7_spflags = mountains, ridges, caverns, nofloatlands

For v5, v6 and it's the same problem, mg_flags is used instead of mgv5_spflags and mgv6_spflags, respectively.

For flat, you used:

mg_flags = none

I don't think this is allowed either. Maybe just remove this line.

Analyzed against Minetest 0.4.16.