Implement max_external_urls_per_simulator setting in [LL-Functions] to allow configuration of how many urls can be set up by llRequestURL()

Defaults remains as 100.
This setting is per simulator instead of per region due to how the url script module is structured.

OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs

@@ -76,7 +76,9 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
         private Dictionary<string, UrlData> m_UrlMap =
                 new Dictionary<string, UrlData>();
 
-
+        /// <summary>
+        /// Maximum number of external urls that can be set up by this module.
+        /// </summary>
         private int m_TotalUrls = 100;
 
         private uint https_port = 0;
@@ -107,6 +109,11 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
             {
                 https_port = (uint) config.Configs["Network"].GetInt("https_port",0);
             }
+
+            IConfig llFunctionsConfig = config.Configs["LL-Functions"];
+
+            if (llFunctionsConfig != null)
+                m_TotalUrls = llFunctionsConfig.GetInt("max_urls_per_simulator", m_TotalUrls);
         }
 
         public void PostInitialise()

bin/OpenSimDefaults.ini

@@ -1168,7 +1168,9 @@
     ; Maximum number of llListen events we allow per script
     ; Set this to 0 to have no limit imposed.
     max_listens_per_script = 64
-
+  
+    ; Maximum number of external urls that scripts can set up in this simulator (e.g. via llRequestURL())
+    max_external_urls_per_simulator = 100
 
 [DataSnapshot]
     ; The following set of configs pertains to search.