* [CSM] Add send_chat_message and run_server_chatcommand API functions
* Add client-side chat message rate limiting
* Limit out chat queue size
* [CSM] Add minetest.clear_out_chat_queue API function and .clear_chat_queue chatcommand
* Last fixes/cleanups before merge
* Allow enabling and disabling mods.
* Re-fix 605599b6f150b89ba6539c4d088231b326adcb48
This breaks some chars like € in chat.
Instead verify is char is a non control char -> iswcntrl
Use runData.dig_time_complete instead of params.time to find out whether it's instant digging.
runData.dig_time_complete is set to something very big if the node can't be dug, whereas param.time is 0 when digging is impossible or it's instant digging. So not using param.time fixes#5728.
Previously, every particle was rendered by (even if not actually visible to)
the client regardless of distance. This significantly reduced client FPS.
Acts clientside, particle spawners are always sent to clients, but each
particle is checked for distance from the player.
As with 'add particle' the distance limit is set to 'max block send distance'
as this determines how far a client can see.
Allow players to clear their own inventory or that of another player with /clearinv command. server privilege is required to clear another player's inventory, no privileges are required to clear your own inventory.'
Previously, every individual particle on a server is sent to, and rendered by
(even if not actually visible), every client regardless of distance. This
significantly reduces client FPS and creates unnecessary network traffic.
Maximum distance is set by 'max block send distance' as this determines how far
a client is able to see.
Also disable CavesRandomWalk at a safer distance from caverns.
Excavating liquids in cavern code is unnecessary as in practice we are already
successfully disabling the generation of liquid caves that could intersect
with caverns and cause excessive amounts of spreading liquids in caverns.
However to be safer this commit now disables liquid caves at a larger distance
from caverns, to compensate for liquid caves being able to generate up to a
mapblock beyond a mapchunk border.
Not excavating liquids in cavern code also allows a feature i am working on in
experimental new core mapgens, but also allows for more flexibility in future.
