Core/Spells: rename MECHANIC_PACIFY to MECHANIC_SLOW_ATTACK and fix a…

… bug with Frost Fever removing by PvP trinket

Closes #457 & #836 & #1195

src/server/game/Miscellaneous/SharedDefines.h

@@ -1186,7 +1186,7 @@ enum Mechanics
     MECHANIC_FEAR             = 5,
     MECHANIC_GRIP             = 6,
     MECHANIC_ROOT             = 7,
-    MECHANIC_PACIFY           = 8,                          //0 spells use this mechanic
+    MECHANIC_SLOW_ATTACK      = 8,
     MECHANIC_SILENCE          = 9,
     MECHANIC_SLEEP            = 10,
     MECHANIC_SNARE            = 11,
@@ -1212,14 +1212,14 @@ enum Mechanics
     MECHANIC_ENRAGED          = 31
 };
 
-// Used for spell 42292 Immune Movement Impairment and Loss of Control (0x49967da6)
+// Used for spell 42292 Immune Movement Impairment and Loss of Control (0x49967ca6)
 #define IMMUNE_TO_MOVEMENT_IMPAIRMENT_AND_LOSS_CONTROL_MASK (\
     (1<<MECHANIC_CHARM)|(1<<MECHANIC_DISORIENTED)|(1<<MECHANIC_FEAR)| \
-    (1<<MECHANIC_ROOT)|(1<<MECHANIC_PACIFY)|(1<<MECHANIC_SLEEP)| \
-    (1<<MECHANIC_SNARE)|(1<<MECHANIC_STUN)|(1<<MECHANIC_FREEZE)| \
-    (1<<MECHANIC_KNOCKOUT)|(1<<MECHANIC_POLYMORPH)|(1<<MECHANIC_BANISH)| \
-    (1<<MECHANIC_SHACKLE)|(1<<MECHANIC_TURN)|(1<<MECHANIC_HORROR)| \
-    (1<<MECHANIC_DAZE)|(1<<MECHANIC_SAPPED))
+    (1<<MECHANIC_ROOT)|(1<<MECHANIC_SLEEP)|(1<<MECHANIC_SNARE)| \
+    (1<<MECHANIC_STUN)|(1<<MECHANIC_FREEZE)|(1<<MECHANIC_KNOCKOUT)| \
+    (1<<MECHANIC_POLYMORPH)|(1<<MECHANIC_BANISH)|(1<<MECHANIC_SHACKLE)| \
+    (1<<MECHANIC_TURN)|(1<<MECHANIC_HORROR)|(1<<MECHANIC_DAZE)| \
+    (1<<MECHANIC_SAPPED))
 
 // Spell dispell type
 enum DispelType