*Implement spell Disengage and Death Grip.

--HG--
branch : trunk

sql/updates/2617_world_spell_linked_spell.sql

@@ -0,0 +1,7 @@
+DELETE FROM `spell_linked_spell` WHERE `spell_trigger` IN (781, 57635, 60932, 61507, 49576);
+INSERT INTO `spell_linked_spell` (`spell_trigger`, `spell_effect`, `type`, `comment`) VALUES
+(781,    56446,  0, 'Disengage'),
+(57635,  57636,  0, 'Disengage'),
+(60932,  60934,  0, 'Disengage'),
+(61507,  61508,  0, 'Disengage'),
+(49576,  49560,  0, 'Death Grip');