* Tools/MeshExtractor: Fixed Doodads and WMOs in the terrain.
Cleaned up a little.
* Tools/MeshExtractor: Some more cleanup and memory management improvements.
* Tools/MeshExtractor: Removed some redundant code
* Tools/MeshExtractor: Implemented mmap mesh generation for instances (They do not have ADT files, they're just a big WMO).
Cleaned up some things and fixed some errors.
ToDo:
* Test this a bit more.
* Cleanup the codebase for this, remove duplicated code.
* Core/SAI: Add 'playerOnly' parameters to SMART_TARGET_CLOSEST_ENEMY and SMART_TARGET_CLOSEST_FRIENDLY. Wiki is updated accordingly.
* DB/Loot: Fix Satchel of Helpful Goods

Closes #10552
Closes #10292
* DB/Loot: correct petdrops from the fishingbags and cleanup the misused reference

Closes #10975
* DB/SAI: Correction on waypoints for quest npc.

Closes #10937
* Core/RBAC: Fix errors in RBAC sql related to ea2fe0217d
* DB/Update: Return To...RP event update

By @Foldor fixes #10886
* Tools/MeshExtractor: Fixed mmap extracting for instance maps and fixed a number of issues.
ToDo:
Cleanup the code a bit.
WILL NOT CURRENTLY WORK WITH TrinityCore, if you want to test it, use the --extract 32 flag of MeshExtractor.
* Tools/MeshExtractor: Some more cleanup.
* Tools/MeshExtractor: Forgot to push some changes.
* Tools/MeshExtractor: Do not delete the polygons before we are done using them.
* Tools/MeshExtractor: Implemented the code to generate mesh files for continent maps.
Fixed a few more things
ToDo:
Test the generated navmesh.
* Whitespace between string literals and user-defined literals is now mandatory for concatenation in C++11
* Core/SAI: Properly implement the second parameter of SMART_ACTION_CALL_TIMED_ACTIONLIST to reflect the wiki (which also makes more sense)
* Tools/MeshExtractor: Fixed the generated mesh for continents.
Fixed a few more issues.
* Are we there, yeti?

By @dr-j fixes #10972
* Core/Vehicles: Fixed calling Vehicle::Uninstall on freed memory

Valgrind log:
    ==7723== Invalid read of size 8
    ==7723==    at 0x10753CE: Vehicle::GetBase() const (Vehicle.h:51)
    ==7723==    by 0x1072449: Vehicle::Uninstall() (Vehicle.cpp:159)
    ==7723==    by 0x10B1E3C: Unit::RemoveVehicleKit() (Unit.cpp:15946)
    ==7723==    by 0x10A8F32: Unit::RemoveFromWorld() (Unit.cpp:13441)
    ==7723==    by 0x11A4703: Creature::RemoveFromWorld() (Creature.cpp:203)
    ==7723==    by 0x11B9AB7: TempSummon::RemoveFromWorld() (TemporarySummon.cpp:279)
    ==7723==    by 0x11B9C6C: Minion::RemoveFromWorld() (TemporarySummon.cpp:308)
    ==7723==    by 0x10A917C: Unit::CleanupBeforeRemoveFromMap(bool) (Unit.cpp:13482)
    ==7723==    by 0x10A926C: Unit::CleanupsBeforeDelete(bool) (Unit.cpp:13504)
    ==7723==    by 0x12DBB89: Map::AddObjectToRemoveList(WorldObject*) (Map.cpp:2108)
    ==7723==    by 0x10F4556: WorldObject::AddObjectToRemoveList() (Object.cpp:2140)
    ==7723==    by 0x11B99C5: TempSummon::UnSummon(unsigned int) (TemporarySummon.cpp:256)
    ==7723==  Address 0x3bd20530 is 64 bytes inside a block of size 168 free'd
    ==7723==    at 0x4C2B59C: operator delete(void*) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
    ==7723==    by 0x1071FD3: Vehicle::~Vehicle() (Vehicle.cpp:66)
    ==7723==    by 0x10B1E71: Unit::RemoveVehicleKit() (Unit.cpp:15947)
    ==7723==    by 0x10A8F32: Unit::RemoveFromWorld() (Unit.cpp:13441)
    ==7723==    by 0x11A4703: Creature::RemoveFromWorld() (Creature.cpp:203)
    ==7723==    by 0x11B9AB7: TempSummon::RemoveFromWorld() (TemporarySummon.cpp:279)
    ==7723==    by 0x11B9C6C: Minion::RemoveFromWorld() (TemporarySummon.cpp:308)
    ==7723==    by 0x10A917C: Unit::CleanupBeforeRemoveFromMap(bool) (Unit.cpp:13482)
    ==7723==    by 0x10A926C: Unit::CleanupsBeforeDelete(bool) (Unit.cpp:13504)
    ==7723==    by 0x12DBB89: Map::AddObjectToRemoveList(WorldObject*) (Map.cpp:2108)
    ==7723==    by 0x10F4556: WorldObject::AddObjectToRemoveList() (Object.cpp:2140)
    ==7723==    by 0x11B99C5: TempSummon::UnSummon(unsigned int) (TemporarySummon.cpp:256)