* Add player deletion method to auth handler (fixes#6653)
* Support iterating over the auth database
There was no way to do this previously and a recent commit
broke doing this the "hacky" way by accessing `core.auth_table`.
Remove player object property 'can zoom'.
Add player object property 'zoom fov'.
Remove clientside setting for 'zoom fov'.
Object property default is 15 degrees in creative mode, zoom disabled
in survival mode.
Needed due to zoom now loading and/or generating distant world
according to zoom FOV.
Update object properties serialisation version to 3.
Falling nodes should make a sound. This can only be done here,
so for simplicity we just call the sound_play() here with the node
place sound. We ignore any gain value in the sound spec since a
falling node should be loud, so the 1.0 default gain makes sense
here.
* Fix default item callbacks to work with nil users
* item.lua: Handle node drops for invalid players
The if-condition for the dropping loop is the same as `inv`, which means that the 2nd possible definition of `give_item` is never used.
Remove redundant `local _, dropped_item`
Formspec input for each individual noise parameter and flag.
Allow noise flags to be set in advanced settings, previously only settable
in minetest.conf.
Standardise 'group format' for noise parameters set in minetest.conf, as
only these support noise flags. However the older 'single line' format is
still accepted to support existing minetest.conf files.
Therefore auto-generate minetest.conf.example with noise parameters in
'group format'.
Setting 'type' in settingtypes.txt is now either 'noise_params_2D' or
'noise_params_3D', the dimension number is displayed in the advanced
settings edit page.
Increase scrollrate depending on fontsize
Scroll on mousewheel
Allow scrolling and marking text on non writable textareas
Update lua api about readonly mode
Show scrollbar if text overflows
Implement network communication for channels
* Implement ModChannel manager server side to route incoming messages from clients to other clients
* Add signal handler switch on client & ModChannelMgr on client to handle channels
* Add Lua API bindings + client packet sending + unittests
* Implement server message sending
* Add callback from received message handler to Lua API using registration method
Feature is unnecessary and would greatly complicate future development,
it would also make 'get biome at pos' extremely complex.
Mgv7: Revert option to repeat surface biomes in floatlands, which
depended on the above.
