Core/Channels: fixed possible exploit with channel password
You were able to setup longer password than you can write into the dialog window. Limit in dialog is 31 chars, in DB is varchar(32) but there was no limit in command /pass <channel> <password>, so that was the problem.
Merge pull request #12919 from MitchesD/misc_3

Core/Channels: fixed possible exploit with channel password
Core/Arena: Replace hardcoded 1500 mmr value by config value when loading arena members
Merge branch 'master' of github.com:TrinityCore/TrinityCore into 4.3.4