Revert "Fix a crash (assert) when client set serial version < 24 in INIT command SER_FMT_VER_LOWEST is set to zero, then the test is stupid in INIT because all client works. In mapblock we check if client's serialization version is < 24, but if client sent serialization version < 24 (15 for example) the server set it and tried to send nodes, then BOOM"

nerzhul is (may?) be working on a new solution. For the moment this is reverted because old worlds cannot be loaded (see discussion on github for the commit).

This reverts commit 800d1927.

Settings fixes Make the GameGlobalShaderConstantSetter use the settings callback (8% perf improvement in game loop) Ensure variable is set Ensure settings callback is threadsafe

Revert "Make the GameGlobalShaderConstantSetter use the settings callback (8% perf improvement in game loop)"

This reverts commit a555e2d9.

Fix a crash (assert) when client set serial version < 24 in INIT command SER_FMT_VER_LOWEST is set to zero, then the test is stupid in INIT because all client works. In mapblock we check if client's serialization version is < 24, but if client sent serialization version < 24 (15 for example) the server set it and tried to send nodes, then BOOM

Make the GameGlobalShaderConstantSetter use the settings callback (8% perf improvement in game loop)
Amend the settings callback to support userdata

Remove widthn and make nridge zero underwater

Remove unnecessary range limiting of persistmap
Skip calculation of filler, mountain, ridge, heat and humidity perlinmaps in underground mapchunks
Skip generateRidgeTerrain in underground mapchunks

Mgv7 generateRidgeTerrain: Enable rangelim of widthn to remove abysses, calculate widthn later in function
Reduce width to 0.2
Carve river channels in deeper waters

I am a native speaker. I have corrected all the mistakes I've found.

Update Spanish language

Caves check for biome nodes, only excavate stone under water level
Unease caves noises, use MT0.3 parameters
Blobgen after cavegen
Biomegen: remove 'is replaceable content' bool

Add -Wall to Debug modes for all compilers and -Wabi for non-MSVC
Use /Ox for MSVC Release mode (potentially higher optimization than /O2)

This reverts commit 7b17b905.

This reverts commit 839c4a99.

-O1 results in executables that are completely useless for actuall debugging

Clean up nearby code a bit

As a small side effect, it is now possible to add a background texture
to the chat console by simply providing background_chat.jpg, it is no
longer necessary to also add "console_color =" to minetest.conf.

Change must_reflow to a deque
Add overload for MapBlock::raiseModified that takes a const char*. This is a speed improvement.
Comment out unused variable
Optimisations to block offset calculations

OpenGL_vertex:
* bufferize a duplicate calcul
* Factorize vertexes

Add optional core.pos_to_string decimal place rounding
Move core.string_to_pos to builtin/common/misc_helpers.lua for consistency