[9889] Extend features available for SCRIPT_COMMAND_TALK

[newsbot]

<pre>m src/game/Map.cpp
m src/game/ObjectMgr.cpp
m src/game/World.h
m src/shared/revision_nr.h

[9889] Extend features available for SCRIPT_COMMAND_TALK

* Allow other than Creature to talk.
* Add "buddy-talk", using creature entry in datalong2 (the npc who will do the talk instead of the original source). Value in datalong3 is how far to look for the buddy.
* Add data_flags making it possible to have conversations between units, controlling who does the talking and to whom, including make player do the talking when player is not already the source.

Notes and details are added in the comments for SCRIPT_COMMAND_TALK

Signed-off-by: NoFantasy <nofantasy@nf.no></pre>



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