Dynamic Creature/Go spawning:

- True blizzlike creature spawn/respawn behavior - new creature = new object
 - Toggleable spawn groups (with C++/SAI/command options to use them)
 - Custom feature: dynamic spawn rate scaling. Accelerates respawn rate based on players in the zone.
 - Backward compatibility mode (set via group and for summons)
   to support creatures/gos that currently don't work well with this
   (this should be removed once the exceptions are fixed)

Fixes and closes #2858
Tags #8661 as fixable.
Fixes and closes #13787
Fixes #15222.

src/server/database/Database/Implementation/WorldDatabase.cpp

@@ -92,6 +92,7 @@ void WorldDatabaseConnection::DoPrepareStatements()
     PrepareStatement(WORLD_DEL_DISABLES, "DELETE FROM disables WHERE entry = ? AND sourceType = ?", CONNECTION_ASYNC);
     PrepareStatement(WORLD_UPD_CREATURE_ZONE_AREA_DATA, "UPDATE creature SET zoneId = ?, areaId = ? WHERE guid = ?", CONNECTION_ASYNC);
     PrepareStatement(WORLD_UPD_GAMEOBJECT_ZONE_AREA_DATA, "UPDATE gameobject SET zoneId = ?, areaId = ? WHERE guid = ?", CONNECTION_ASYNC);
+    PrepareStatement(WORLD_DEL_SPAWNGROUP_MEMBER, "DELETE FROM spawn_group WHERE spawnType = ? AND spawnId = ?", CONNECTION_ASYNC);
 }
 
 WorldDatabaseConnection::WorldDatabaseConnection(MySQLConnectionInfo& connInfo) : MySQLConnection(connInfo)

src/server/database/Database/Implementation/WorldDatabase.h

@@ -98,6 +98,7 @@ enum WorldDatabaseStatements : uint32
     WORLD_DEL_DISABLES,
     WORLD_UPD_CREATURE_ZONE_AREA_DATA,
     WORLD_UPD_GAMEOBJECT_ZONE_AREA_DATA,
+    WORLD_DEL_SPAWNGROUP_MEMBER,
 
     MAX_WORLDDATABASE_STATEMENTS
 };