YEngine, change default number of exec threads to 2 of priority Normal. Let the threads priority a option on ini files

bin/OpenSimDefaults.ini

@@ -1750,6 +1750,33 @@
 	; MeshModelAllowTextureToInventory = true
 	
 
+[YEngine]
+    ;; implements non preemptive microthreading, so fixing problems like llSleep or long events handlers
+    ;; but those will suffer from timeslicing, so will be slower.
+    ;; warning: scripts state is lost on TP or cross to Xengine regions (cars stop, etc)
+    ;; ignore its extensions (subset of original XMRengine), those are still undefined.
+    ;Enabled = false
+    
+    ; maximum stack a script can use in KB
+    ;ScriptStackSize = 2048
+    
+    ; maximum heap memory a script can use in KB
+    ;ScriptHeapSize = 1024
+
+    ; number of threads to execute script. Too many threads can have negative impact on other region operations
+    ;NumThreadScriptWorkers = 2
+
+    ; Priority of those threads (Lowest, BelowNormal, Normal, AboveNormal or Highest). Higher priorit can have negative impact on other region operations
+    ;Priority = Normal
+
+    ; to reuse binary compare sources using a hash codes of them or full text
+    UseSourceHashCode = true
+
+    MinTimerInterval = 0.1
+
+    ; scripts states and cache parent folder location
+    ;ScriptBasePath="ScriptEngines"
+
 
 [XEngine]
     ; Enable this engine in this OpenSim instance