Core/Server: Add missing overrides
Core/Server: Use nullptr instead of 0 where pointers are expected
Core: Fix build for Intel Composer XE
DB/Quest: Fix Hunter Trainer Offering Quest To Rogues

By MrSmite, closes #12809
DB/Misc: Add More missing texts

Add missing texts for hellfire peninsula.
Core/NetworkIO: Allow receiving packets bigger than buffer size and properly handle situations where not entire packet was read in one go

Core/Authserver: Restored authenticator functionality
Core/Authserver: Fixed writing to invalid memory address
Core/Worldserver: Replaced old hack sending key events to unblock console thread
Core/Misc: Removed ACE leftovers