Everywhere where wstrgettext was used, its output was converted back
to utf8. As wstrgettext internally converts the return value
from utf8 to wstring, it has been a waste. Remove the function, and
use strgettext instead.

- setOpenedTrees(): this internal function was calling setSelected()
  to update m_selected. Since setSelected() calls autoScroll(),
  this caused the scrollbar to scroll back to the selected row
  in some cases when that shouldn't be done.

  For example, clicking the "+" to open a tree caused autoscroll.

  Fix this by making setOpenedTrees() modify m_selected directly.

- setDynamicData(): set scrollbar position after calling
  setSelected(), not before. This avoids setSelected()'s autoscroll
  messing up the scrollbar position again.

- setSelected(): If an invisible row is selected, open all parents
  of the selected row in order to make the selected row visible.

  This fixes the issue where all the trees are closed again whenever
  you return from the setting edit dialog to the settings tab.

Settings are automatically parsed from builtin/settingtypes.txt
The edit dialog automatically adjust based on the type of setting

- Fix some incompatibilities with obscure platforms (AIX and WinCE)
- Clean up Thread class interface
- Add m_ prefix to private member variables
- Simplify platform-dependent logic, reducing preprocessor
  conditional clauses and improving readibility
- Add Thread class documentation

- Add "thr_" prefix to thread utility functions
- Compare threadid_ts in a portable manner, where possible

The invsize formspec element is outdated. Even though,
it is still supported, only a deprecation warning is shown,
introduced by commit [1]. The lua context passed to the
log_deprecated method added by commit [1] is NULL for the
invsize deprecation warning, as its run on the client and not
the server.

Commit [1] has removed checks for NULL inside the log_deprecated
method, resulting in a crash when a formspec with an invsize
element is parsed. This commit puts the check back.

Fixes #3260.

Referenced commits:

[1]: b5acec0a "Add proper lua api deprecated handling"

[2]: 7b8d3729 "Use warningstream for deprecated field messages and refactor log_deprecated"

Commit

d2ca6625 "Enforce hiding nametag"

didn't fix the issue for "client" instances, where the nametag update
was received before the object was added to the scene. This resulted
in the grey shadow on the nametag that commit tried to fix.

Thanks to @neoascetic for pointing out that there still is a shadow.

All log operations are now added to the syslog implicitly.
Also, pass along mutable string to argument vector for main().

These names are reserved for the compiler/library implementations.

Remove DTIME macro and its uses, too

- Add warning log level
- Change debug_log_level setting to enumeration string
- Map Irrlicht log events to MT log events
- Encapsulate log_* functions and global variables into a class, Logger
- Unify dstream with standard logging mechanism
- Unify core.debug() with standard core.log() script API

- SRP: print the address only once, not twice
- Legacy: previously the address was not printed at all
- Make both messages structurally the same, to facilitate log analyzers

Player now spawns on julia set due to julia offset
Add commented-out '#include profiler.h' for timetaker use
Use v3fs to reduce number of parameters
Tune tunnel width to match mgv7

Fixes a bug where the old list ring remained when a new formspec
was displayed over the old one. This created the list-ring of the new formspec
to be partly ignored.

Thanks to @VanessaE to report the bug, and @DonBatman to produce the code that
exposed it.

Update copyright years in all mapgens
Add myself to copyright notices in mgv5 and mgv7

This might break some mods, but it is important for all uses of the param2 to
be documented.

This doesn't need a serialisation version or network protocol version change,
as old clients will still work on new servers, and it is bearable to have
new clients getting non rotated plants on old servers.

Major refactor of emerge.cpp and Map::init/finishBlockMake

It returns the index used in mg->biomemap for a given biome name.
The biomemap is useless without this unless you re-register all existing biomes,
which could cause problems for anyone else trying to use biomemap.
With this, you can quickly create a lookup table of ids and names.

Also add PATH_DELIM for Windows compatibility.

Get facedir by using lowest 5 bits of param2 and limiting to 23
More robust, frees up higher param2 bits for other uses
Change lookup table and table index to u8

-> Remove memory allocation bugs
-> Merge changes from upstream, enabling customizeable memory allocation

1. Check for entity addition success in spawn_item implementation
2. Check for success in item_drop callback, so that the player
doesn't lose the item if they are outside bounds and try to drop it.
3. When existing player joins game, check that their position is inside
map bounds. If not, set their position to the return value of findSpawnPos().
4. Make findSpawnPos() respect the border

2 fixes a lua crash if a player drops an item outside map bounds.
3 fixes an assertion crash if a player leaves when being outside map bounds,
and then rejoins.