Thank you kindly, Godfrey, for a patch that:

The new IRCd module causes an error when multiple instances of OpenSim 
are run on the same machine; since the port number (6666) is hardcoded,
the second and subsequent instances crash upon startup because the port 
is already in use. Attached is a patch which adds a Port specifier to the 
[IRCd] section of the config file, which defaults to 6666 if not present.

1 files changed, 2 insertions, 1 deletions

diff --git a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/IRCStackModule.cs b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/IRCStackModule.cs
index 30a39b3..4b199ac 100644
--- a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/IRCStackModule.cs
+++ b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/IRCStackModule.cs
@@ -49,8 +49,9 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView
             if (null != source.Configs["IRCd"] &&
                 source.Configs["IRCd"].GetBoolean("Enabled",false))
             {
+                int portNo = source.Configs["IRCd"].GetInt("Port",6666);
                 m_scene = scene;
-                m_server = new IRCServer(IPAddress.Parse("0.0.0.0"), 6666, scene);
+                m_server = new IRCServer(IPAddress.Parse("0.0.0.0"), portNo, scene);
                 m_server.OnNewIRCClient += m_server_OnNewIRCClient;
             }
         }