Core/Movement: Add new SplineChainMovementGenerator that allows accurate replication of sniffed waypoints in static sequences, along with DB facilities that allow loading of waypoints from DB.

src/server/game/Scripting/ScriptMgr.cpp

@@ -1113,6 +1113,7 @@ void ScriptMgr::Unload()
 void ScriptMgr::LoadDatabase()
 {
     sScriptSystemMgr->LoadScriptWaypoints();
+    sScriptSystemMgr->LoadScriptSplineChains();
 }
 
 void ScriptMgr::FillSpellSummary()