Core:

- Redesigned stealth and invisibility handling
  - Implemented the handling of multiple stealth types
- Implemented fake inebriation
- The message deliverer no longer sends packets from a non-visible source
  - The server won't send that much garbage which just takes bandwith
  - It won't be possible to use cheats to detect invisible objects
- Removed a lot of checks for the Z-coord
  - Fixes visibility problems happening while flying
- Limited the grid activation range of creatures to use less resources
- Implemented Shroud of Death
- Implemented increased visibility range for active objects
- Removed visibility check at spellhit (only sanctuary effects should prevent it)
(And a lot of other changes...)

Closes issue 4208
Closes issue 3049
Closes issue 2097
Closes issue 2198
Closes issue 2384
Closes issue 2197
Closes issue 2319

--HG--
branch : trunk

src/server/game/Miscellaneous/SharedDefines.h

@@ -980,6 +980,46 @@ enum SpellCastResult
     SPELL_CAST_OK = 255 // custom value, don't must be send to client
 };
 
+enum StealthType
+{
+    STEALTH_GENERAL     = 0,
+    STEALTH_TRAP        = 1,
+
+    TOTAL_STEALTH_TYPES = 2
+};
+
+enum InvisibilityType
+{
+    INVISIBILITY_GENERAL     =  0,
+    INVISIBILITY_UNK1        =  1,
+    INVISIBILITY_UNK2        =  2,
+    INVISIBILITY_TRAP        =  3,
+    INVISIBILITY_UNK4        =  4,
+    INVISIBILITY_UNK5        =  5,
+    INVISIBILITY_DRUNK       =  6,
+    INVISIBILITY_UNK7        =  7,
+    INVISIBILITY_UNK8        =  8,
+    INVISIBILITY_UNK9        =  9,
+    INVISIBILITY_UNK10       = 10,
+    INVISIBILITY_UNK11       = 11,
+
+    TOTAL_INVISIBILITY_TYPES = 12
+};
+
+enum ServerSideVisibilityType
+{
+    SERVERSIDE_VISIBILITY_GM          = 0,
+    SERVERSIDE_VISIBILITY_GHOST       = 1,
+
+    TOTAL_SERVERSIDE_VISIBILITY_TYPES = 2
+};
+
+enum GhostVisibilityType
+{
+    GHOST_VISIBILITY_ALIVE = 0x1,
+    GHOST_VISIBILITY_GHOST = 0x2
+};
+
 // Spell aura states
 enum AuraState
 {   // (C) used in caster aura state     (T) used in target aura state