initialize block cache with nullptr
Do not allow the m_transforming_liquid queue to increase until all RAM is consumed
Remove manual biome noise translation
Suppress compiler warning
Fix visual_scale for NDT_PLANTLIKE being set too small
Temporarily set default biome in builtin

This should probably be removed when minetest_game has proper biomes.
If I hear "the whole map is just stone!" again after this, I am going to detonate.
Fix visual_scale for plantlike nodes (again)

fixes #1989

move the plant to the bottom of its node properly, without affecting its scale.  See isue #1989
Merge remote-tracking branch 'minetest/master'

Conflicts:
	freeminer.conf.example
	src/defaultsettings.cpp
	src/map.cpp
	src/map.h
new: Support converting settings to jsson