Patch 4.1.0/API changes

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Breaking changes

• COMBAT_LOG_EVENT and COMBAT_LOG_EVENT_UNFILTERED have a new third parameter, hideCaster.
• Addons are now required to register the prefixes they want to receive SendAddonMessage messages for using RegisterAddonMessagePrefix.

API changes

• REMOVED CanTransform / Transform; worgen transformation is now treated entirely as a spell.
• REMOVED GetPetHappiness along with actual pet happiness.
• REMOVED RenameEquipmentSet
• NEW calendar extensions
  • CalendarContextEventCanRemove
  • CalendarEventGetTypesDisplayOrdered
  • GetEventTime
  • GetCurrentEventID
• NEW Looking For Guild / Guild Recruitment API
  • CancelGuildMembershipRequest
  • DeclineGuildApplicant
  • GetGuildApplicantInfo
  • GetGuildApplicantSelection
  • GetGuildMembershipRequestInfo
  • GetGuildMembershipRequestSettings
  • GetGuildRecruitmentComment
  • GetGuildRecruitmentSettings
  • GetLookingForGuildComment
  • GetLookingForGuildSettings
  • GetNumGuildApplicants
  • GetNumGuildMembershipRequests
  • GetNumRecruitingGuilds
  • GetRecruitingGuildInfo
  • GetRecruitingGuildSelection
  • GetRecruitingGuildSettings
  • GetRecruitingGuildTabardInfo
  • RequestGuildApplicantsList
  • RequestGuildMembership
  • RequestGuildMembershipList
  • RequestGuildRecruitmentSettings
  • RequestRecruitingGuildsList
  • SetGuildApplicantSelection
  • SetGuildRecruitmentComment
  • SetGuildRecruitmentSettings
  • SetLookingForGuildComment
  • SetLookingForGuildSettings
  • SetRecruitingGuildSelection
• NEW Looking for Group Call To Arms (role shortage) API
  • GetLFGDungeonShortageRewardInfo
  • GetLFGDungeonShortageRewardLink
  • GetLFGRoleShortageRewards
• NEW Guild Challenges API
  • GetGuildChallengeInfo
  • GetNumGuildChallenges
  • RequestGuildChallengeInfo
• NEW Opt-in Addon Communication API
  • GetRegisteredAddonMessagePrefixes
  • IsAddonMessagePrefixRegistered
  • RegisterAddonMessagePrefix

• NEW CanEditGuildBankTabInfo
• NEW CancelEmote
• NEW ClearAllTracking
• NEW GetAddOnOptionalDependencies
• NEW GetDebugSpellEffects
• NEW GetDungeonForRandomSlot
• NEW GetGuildBankBonusDepositMoney
• NEW GetInspectRatedBGData
• NEW GetMaxAnimFramerate
• NEW GetNamePlateMotionType
• NEW GetNetIpTypes
• NEW GetNumDungeonForRandomSlot
• NEW GetNumNamePlateMotionTypes
• NEW GetNumberOfDetailTiles
• NEW GetTrainerTradeskillRankValues
• NEW IsIPv6Available
• NEW IsOnTournamentRealm
• NEW IsOnePersonParty
• NEW IsRatedMap
• NEW IsTrialAccount
• NEW ModifyEquipmentSet
• NEW SetBarSlotFromIntro
• NEW SetGuildMemberRank
• NEW SetMaxAnimFramerate
• NEW SetNamePlateMotionType
• NEW UnitThreatPercentageOfLead

Event changes

• COMBAT_LOG_EVENT and COMBAT_LOG_EVENT_UNFILTERED have a new third parameter, shifting existing parameters to the right.
• REMOVED END_REFUND, items no longer become unrefundable due to enchanting, etc.
• REMOVED HONOR_CURRENCY_UPDATE, honor now treated as ordinary currency
• REMOVED INSPECT_TALENT_READY, talent information available by default.
• REMOVED KNOWN_CURRENCY_TYPES_UPDATE