Partially address #13483. Server operators can set a minimum
protocol version to match the game requirements (or any other
restriction they may want), and it's applied as an additional
constraint on top of the baseline compatibility range, optional
strict_protocol_version_checking, and any kick-on-join used by
the game/mods.
The code relied on touch IDs being consecutive. This is true on Android, but not on Linux.
Therefore, touch input on Linux was broken since 53886dcdb52de80d862539e22950c84fbf88df88.
Before and after as obtained via `pahole -C MapBlock bin/minetest`:
/* size: 336, cachelines: 6, members: 23 */
/* sum members: 329, holes: 4, sum holes: 7 */
vs.
/* size: 336, cachelines: 6, members: 23 */
/* sum members: 329, holes: 2, sum holes: 7 */
There is not much to be gained by packing but I made sure
to move the most important data (mainly for the client) into
the first cache line.
Use win32 APIs to write the temporary file before copying to the final
destination. Because we've observed the final file being empty, we
suspect that std::ostream::flush is not flushing.
Also add a test for it.
This adds a new setting to set sound volume multiplier when Minetest window is unfocused/inactive (sound_volume_unfocused, located in Settings > Graphics and Audio > Audio > Volume when unfocused).
If the window is not focused, the sound volume will be multiplied by sound_volume_unfocused setting. The sound volume will be set back to sound_volume again when the window is focused.
To not instantly free GUIFormSpec upon close/quit, Game periodically
cleans up the remaining instance on the next frame.
When a new formspec is received and processed after closing the previous formspec
but before the cleanup in Game, the formspec would be closed regardless.
This now re-creates the formspec when the old one is already pending for removal.
