Core/NetworkIO: *Fixed basic auth packets
Fixed basic character packets
Nulled all opcodes
Thanks to @Shauren for pointing some derps out

Signed-off-by: Sovak <sovak007@gmail.com>
DB/Hotfixes: Fixed a problem from the parser
DB: Create hotfixes_database.sql file and update .travis.yml to import hotfixes

Note: hotfixes_database.sql will be empty until the next TDB release

And here's a friendly reminder that trinity now uses 4 DBs: characters, auth, world and hotfixes
DB: Move hotfixes_database.sql to the /dev folder (just like world)
Battle.net: Fixed JoinRequestV2 and JoinResponseV2 structures
Core/PacketIO: Updated packet headers to 6.0
Merge pull request #13361 from Sovak/602

Core/NetworkIO: *Fixed basic auth packets
SQL: Removex 6x from file names
Merge branch '6.x' of github.com:TrinityCore/TrinityCore into packitify

Conflicts:
	src/server/game/Handlers/AuthHandler.cpp
	src/server/game/Server/WorldSession.cpp
	src/server/game/Server/WorldSocket.cpp