[mr3245] Allow to execute mangos_strings on both table versions. (For mangosR2 and mangos3). Also added missing creature_template change.
[mr3246] Fix possible crash in Achievements code. Thanks to ike3 for pointing. Close #1443
[mr3247] Fix mangos indexes related to creature_template table. Thanks to VirusGoD for pointing.
[12670] Add missing spell id 21883

Close scriptdev2/scriptdev2#106

Conflicts:
	src/shared/revision_nr.h
	src/shared/revision_sql.h
[12671] Implement ACTION_T_CHANGE_MOVEMENT for EventAI

This will allow changing the creature movement based on eventAI events.

Requested in scriptdev2/scriptdev2-cata#4

Conflicts:
	src/shared/revision_nr.h
[12672] Implement SCRIPT_COMMAND_SEND_AI_EVENT_AROUND for dbscripts engine

This allows more flexibility in interaction between eventAI and dbscripts

Conflicts:
	src/shared/revision_nr.h
[mr3248] Battleground SQL fixes.
Merge remote-tracking branch 'remotes/mangosR2.mangos/master'