* Combine client and server man pages.
  * Update unit test options and available databases in man page.
  * Add `--worldname` to man page.
  * Fix a bunch of places where `"Minetest"` was used directly instead of `PROJECT_NAME`.
  * Disable server build by default on all operating systems.
  * Make `ENABLE_FREETYPE` not fail if FreeType isn't found.
  * Enable LevelDB, Redis, and FreeType detection by default.
  * Remove the `VERSION_PATCH_ORIG` hack.
  * Add option to search for and use system JSONCPP.
  * Remove broken LuaJIT version detection.
  * Rename `DISABLE_LUAJIT` to `ENABLE_LUAJIT`.
  * Rename `minetest_*` variables in `version.{h,cpp}` to `g_*`.
  * Clean up style of CMake files.

Don't send an InventoryAction at each setInventoryModified, we only need one SendInventory per inventory modification

Client doesn't like to receive multiples SendInventory for one action, this can trigger glitches on clients (sometimes due to incorrect UDP packet ordering due to UDP protocol)

This fix issue #2544

Increases the key/buttons repeat delay for fly, noclip, fast, debug and camera buttons

This feature is still experimental and has some issues. Also,
increase texture_min_size to 64 px. The setting was initially
a conservative 16 so that the effect would not be noticable
for players who aren't using aniso/bi/trilinear filtering. This
isn't necessary now that texture_clean_transparent is disabled
by default.

Remove the --system=linux-x86_64 which isn't neccessary on 64 bit,
as, when given no --system parameter, the standalone-toolchain.sh script
figures out the platform on itself. Naturally, the hardcoded setting broke
android building on 32 bit systems.

Previously, cmake po detection would treat the "timestamp" file created by building for android as own language directory.

Previously, calling it resulted in a crash.

Sometimes HUD can be modified by ServerThread and EmergeThread results in a crash on client side because the HUD is not correct

Fixes biome layer at y = 47 when base/alt terrain exceeds it
Also fixes missing dust glitch at y = 47
Mgv5/mgv7:Cleanup code

This reverts commit 467fc0dd.

Remove unused ConnectionCommand::sendToAll function. NetworkPacket::oldForgePacket returns Buffer instead of SharedBuffer and is used in ConnectionCommand instead of Connection::Send
This remove the NetworkPacket buffer => SharedBuffer => Buffer copy. Now NetworkPacket => Buffer

This call was missing when change looping to triggering SendInventory: 1b2f6447

Fix composite textures with texture_min_size. Moved upscaling of textures to later in the process, when images are converted to textures, instead of right after image load, so the original image is unmodified for generateImagePart.

Signed off by: ShadowNinja, kwolekr

Signed off by: Zeno, kwolekr

Revert "Fix issue #2441: crash on respawn, since a conversion std::list to std::vector on Environment.cpp"

This reverts parts of commit 9749d9fe, which breaks node resolver
list clearing

Mgv5: Add large_cave_depth constant

This was a regression introduced by f6e4c5d9 .

Desert stone above y = -32 not water_level
Remove unused generateExperimental()

Create Parameters on world initialisation and set settings of old worlds