DB/Loot: Rework skinning_loot_template definitions, removing the horrible definitions ripped from wowhead and replacing them with a proper defined set of loot

Closes #10610
Core/Socket: Fix race condition in WorldSocket

ReactorRunnable::svc() checks the status of WorldSockets while WorldRunnable::run() updates them, causing a race condition.

Helgrind log:
Possible data race during write of size 8 at 0x49961810 by thread #9
Locks held: 1, at address 0x4367A620
   at 0x51781F7: ACE_Message_Block::copy(char const*, unsigned long) (Message_Block.inl:372)
   by 0x15D048F: WorldSocket::SendPacket(WorldPacket const&) (WorldSocket.cpp:180)
   by 0x141C45E: WorldSession::SendPacket(WorldPacket const*) (WorldSession.cpp:223)
   by 0x15C49C4: WorldSession::SendAuthResponse(unsigned char, bool, unsigned int) (AuthHandler.cpp:37)
   by 0x14DA71C: World::AddSession_(WorldSession*) (World.cpp:278)
   by 0x14E601E: World::UpdateSessions(unsigned int) (World.cpp:2617)
   by 0x14E3E67: World::Update(unsigned int) (World.cpp:1986)
   by 0x100EAFA: WorldRunnable::run() (WorldRunnable.cpp:60)
   by 0x163A626: ACE_Based::Thread::ThreadTask(void*) (Threading.cpp:186)
   by 0x518F555: ACE_OS_Thread_Adapter::invoke() (OS_Thread_Adapter.cpp:103)
   by 0x4C2B5AD: mythread_wrapper (hg_intercepts.c:219)
   by 0x61DAB4F: start_thread (pthread_create.c:304)

This conflicts with a previous read of size 8 by thread #14
Locks held: none
   at 0x1008414: ACE_Message_Block::length() const (Message_Block.inl:131)
   by 0x15D1207: WorldSocket::Update() (WorldSocket.cpp:448)
   by 0x1427CA3: ReactorRunnable::svc() (WorldSocketMgr.cpp:177)
   by 0x51CBB16: ACE_Task_Base::svc_run(void*) (Task.cpp:271)
   by 0x51CD3BC: ACE_Thread_Adapter::invoke_i() (Thread_Adapter.cpp:161)
   by 0x51CD4D4: ACE_Thread_Adapter::invoke() (Thread_Adapter.cpp:96)
   by 0x4C2B5AD: mythread_wrapper (hg_intercepts.c:219)
   by 0x61DAB4F: start_thread (pthread_create.c:304)

Address 0x49961810 is 16 bytes inside a block of size 80 alloc'd
   at 0x4C286BB: operator new(unsigned long, std::nothrow_t const&) (vg_replace_malloc.c:316)
   by 0x15D0818: WorldSocket::open(void*) (WorldSocket.cpp:237)
   by 0x1429560: ACE_Acceptor<WorldSocket, ACE_SOCK_Acceptor>::activate_svc_handler(WorldSocket*) (Acceptor.cpp:347)
   by 0x142916D: ACE_Acceptor<WorldSocket, ACE_SOCK_Acceptor>::handle_input(int) (Acceptor.cpp:429)
   by 0x515F48D: ACE_Dev_Poll_Reactor::dispatch_io_event(ACE_Dev_Poll_Reactor::Token_Guard&) (Dev_Poll_Reactor.inl:86)
   by 0x5161653: ACE_Dev_Poll_Reactor::handle_events(ACE_Time_Value*) (Dev_Poll_Reactor.cpp:1015)
   by 0x51ACCFC: ACE_Reactor::run_reactor_event_loop(ACE_Time_Value&, int (*)(ACE_Reactor*)) (Reactor.cpp:267)
   by 0x1427C57: ReactorRunnable::svc() (WorldSocketMgr.cpp:170)
   by 0x51CBB16: ACE_Task_Base::svc_run(void*) (Task.cpp:271)
   by 0x51CD3BC: ACE_Thread_Adapter::invoke_i() (Thread_Adapter.cpp:161)
   by 0x51CD4D4: ACE_Thread_Adapter::invoke() (Thread_Adapter.cpp:96)
   by 0x4C2B5AD: mythread_wrapper (hg_intercepts.c:219)
DB/Loot: make sure to update & delete the right templates, updated file!
SQL: Fix fail in 7facda2002e80401ce71ab7562042293eba62ad6
DB/Misc: Fix startup errors & typo
Core/Objects: Removed obsolete code
Core/Spell: Fix farsight log error "Player requests non-existing seer"

Partially revert 167ca565d044915f01ead4b189754ab1c44cc981 which wrongly used TYPEMASK_UNIT to denote Creatures and Players, so when a Player sent farsight opcode with another Player as target HandleFarSightOpcode() couldn't find the right Unit filtering by typemask TYPEMASK_SEER.
Merge pull request #10687 from jackpoz/farsight_fix

Core/Spell: Fix farsight log error "Player requests non-existing seer"
DB/SAI: Fix quest credit for quest "Laying Waste to the Unwanted"
Merge pull request #10563 from Ascathor/master

Core/Account: Make account password change security variable and various changes
Merge pull request #10696 from jackpoz/socket_race_condition

Core/Socket: Fix race condition in WorldSocket