Core/Spells:

* Festering Strike will now increase the duration of Frost Fever and Blood Plague up to 6 seconds
* Diseases will now properly benefit from their mastery bonus

sql/updates/world/custom/custom_2019_11_04_01_world.sql

@@ -0,0 +1,3 @@
+DELETE FROM `spell_script_names` WHERE `ScriptName`= 'spell_dk_festering_strike';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(85948, 'spell_dk_festering_strike');