Fix IRCd init check for config section

The IRCStackModule used Nini.Config.ConfigCollection.Contains() to
determine whether the "IRCd" section was present in the config. This
ConfigCollection, however, stores an ArrayList of IConfig objects, not
strings, so calling Contains("IRCd") always returns false since "IRCd"
is a string, not an IConfig object.

OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/IRCStackModule.cs

@@ -19,7 +19,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView
 
         public void Initialise(Scene scene, IConfigSource source)
         {
-            if (source.Configs.Contains("IRCd") &&
+            if (null != source.Configs["IRCd"] &&
                 source.Configs["IRCd"].GetBoolean("Enabled",false))
             {
                 m_scene = scene;