* Add missing tables of registered things
* Eliminate some duplication
Registration functions in 'Registered definitions' section merged into
'Registration functions' section.
* Misc. fixes
* Add privilege definition table
* Remove not-special soil group from special groups
* Merge two registration functions sections
* Move 'added to' information to tables section
Also fix some capitalization and missing periods
* Minor fixes
* Split Registration functions into two subsections
And update Registered definition tables to match order
* Fixes
Move star draw to before sun glow texture draw and before sun draw,
not currently essential but the logical order. Will be necessary if
a 'no far ground' option is added, to draw stars behind the sun.
```
[ 10%] Building CXX object src/CMakeFiles/minetest.dir/client/render/interlaced.cpp.o
cc1plus: warning: -Wabi won't warn about anything [-Wabi]
cc1plus: note: -Wabi warns about differences from the most up-to-date ABI, which is also used by default
cc1plus: note: use e.g. -Wabi=11 to warn about changes from GCC 7
```
Reported by GCC
```
minetest/src/server.cpp:996:42: warning: ‘peer_id’ may be used uninitialized in this function [-Wmaybe-uninitialized]
errorstream << "ProcessData: peer=" << peer_id << e.what() << std::endl;
```
Targets SDK 26 as required by the playstore.
Fixes screen auto-rotation closing game.
Hides on-screen navigation bar if present.
Update gradlew.
Fix display aspect on 18+/:9 displays (like a Samsung Galaxy S9).
Remove small app icons, not required.
Fix xml in unpacking activity.
Support Android permission: On Android 6.0+ you need to manually give write
permission (as required by google).
Background during unpacking (just a demo for now).
Material Design: no more Android 2 interface.
Immersive mode (Android 4.4+ - hide NavBar for fullscreen mode).
At sunset:
Stars first appear slightly later, at the time the sun disappears over the horizon,
this fixes seeing dark stars in front of the sun horizon glow texture.
Stars reach full brightness slightly earlier at time 20000, not so excessively long
after sunset.
The above behaviour is also applied at sunrise, but of course, time-inverted.
In pitch fly mode, you fly to the exact direction you are pointing at, using the forward key. Other move directions are also pitched accordingly.
It allows smoother and more complex movements.
Can be enabled/disabled by L key by default (set keymap_pitchfly in minetest.conf)
script_get_backtrace() was leaving its return value on the stack, corrupting
subsequent lua operations for functions that did not immediately return.
This problem can specifically be observed in the case of multiple "groupcaps"
entries, each of which provides the legacy "maxwear" property. These cause a
backtrace and thus pollute the stack for the following lua_next() call.
