Implement new always_aggro_foes field and functionality for mobs.

utils/sql/db_update_manifest.txt

@@ -404,6 +404,7 @@
 9148|2020_01_28_corpse_guild_consent_id.sql|SHOW COLUMNS FROM `character_corpses` LIKE 'guild_consent_id'|empty|
 9149|2020_02_06_globalloot.sql|SHOW COLUMNS FROM `global_loot` LIKE 'hot_zone'|empty|
 9150|2020_02_06_aa_reset_on_death.sql|SHOW COLUMNS FROM `aa_ability` LIKE 'reset_on_death'|empty|
+9151|2020_03_05_npc_always_aggro.sql|SHOW COLUMNS FROM `npc_types` LIKE 'always_aggros_foes'|empty|
 
 # Upgrade conditions:
 # 	This won't be needed after this system is implemented, but it is used database that are not

utils/sql/git/required/2020_03_05_npc_always_aggro.sql

@@ -0,0 +1 @@
+ALTER TABLE `npc_types` ADD COLUMN `always_aggros_foes` tinyint(4) NOT NULL DEFAULT 0;