Eluna implementation (#847)

* azerothcore + eluna done.

* Remove the Eluna single thread limit.

* Read Eluna Settings file.

* submodule change.

* fix(test)  Ubuntu - Cant Link Library after Compile

* The ELUNA is disabled by default.

* remove submodule luaEngine.

* some change

* fix a error

* change cmake

* fix: some onplayerchat does not have hooks.

* Eluna: Add BG event Hooks.

* fix:cmake hook AFTER_LOAD_CONF not work.

* Remove the eluna switch.

* Remove some define in the core.

* fix conf file not read in the linux.

* eluna : change bg hook parameter type

* Remove TC log function call

* change bg hook OnBGEnd parameter type.


Note: to enable Eluna, the module is required

src/server/game/Globals/ObjectMgr.cpp

@@ -5678,7 +5678,11 @@ uint32 ObjectMgr::GetNearestTaxiNode(float x, float y, float z, uint32 mapid, ui
         uint32 submask = 1<<((i-1)%32);
 
         // skip not taxi network nodes
+#ifndef ELUNA
         if ((sTaxiNodesMask[field] & submask) == 0)
+#else
+        if (field >= TaxiMaskSize || (sTaxiNodesMask[field] & submask) == 0)
+#endif
             continue;
 
         float dist2 = (node->x - x)*(node->x - x)+(node->y - y)*(node->y - y)+(node->z - z)*(node->z - z);