[10970] Implement mass mail send infrastructure.

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автор: VladimirMangos

m src/game/Mail.cpp

m src/game/Mail.h

m src/game/Makefile.am

+ src/game/MassMailMgr.cpp

+ src/game/MassMailMgr.h

m src/game/World.cpp

m src/game/World.h

m src/mangosd/mangosd.conf.dist.in

m src/shared/revision_nr.h

m win/VC100/game.vcxproj

m win/VC100/game.vcxproj.filters

m win/VC80/game.vcproj

m win/VC90/game.vcproj

[10970] Implement mass mail send infrastructure.



It expected to be used in 2 case: some gameevent must send mails at start/end,

and this can be useful in game commands. Both case wil implemented in later commits.



* New MassMailMgr can accept tasks for send mass mails in safe way for map update threads context/etc.

* It work in way:

   - By provided race mask or more generic SQL query string in async query selected affected characters

   - At query result ready at next world tick update in safe common part of tick code some from mails

     from queued mas mail tasks send.

   - Amount mails limited MassMailer.SendPerTick confir option (10 by default). This done for prevent

     high server load/lags at send too many mails in one tick (mail send all existed characters in DB

     who match to seelction criteria)

   - Manager not persistant for server shutdowns so any not send mails in queue lost at shutdown.

     But with default setting 10K mail send in 20 secs (10000/50/10). Adding more safe execution

     for this case will make related code lot more slow and req. many DB tables and code support.

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