Core/GuardAI: Guards don't evade if the target casts Vanish and also can detect players with Feign Death.

Core/Scripts: Moved scripts from ScriptedGuardAI to guards.cpp
Core/Creature: Removed custom npcflags UNIT_NPC_FLAG_GUARD (now moved to flag_extras) and UNIT_NPC_FLAG_OUTDOORPVP (not used)

Thanks to Kaelima, Xanadu, Shauren and linencloth.

Signed-off-by: Manuel Carrasco <manue.l@live.com.ar>

src/server/game/Entities/Object/Object.cpp

@@ -529,7 +529,7 @@ void Object::_BuildValuesUpdate(uint8 updatetype, ByteBuffer * data, UpdateMask
                 if (index == UNIT_NPC_FLAGS)
                 {
                     // remove custom flag before sending
-                    uint32 appendValue = m_uint32Values[ index ] & ~(UNIT_NPC_FLAG_GUARD + UNIT_NPC_FLAG_OUTDOORPVP);
+                    uint32 appendValue = m_uint32Values[ index ];
 
                     if (GetTypeId() == TYPEID_UNIT)
                     {