updated to use lastest version of libsl but is currently broke when using SL viewer 1.15.02, due to big changes in the message templates.

OpenSim.RegionServer/OpenSim.RegionServer.dll.build

@@ -58,6 +58,7 @@
                 <include name="../bin/OpenSim.GenericConfig.Xml.dll" />
                 <include name="../bin/OpenSim.Physics.Manager.dll" />
                 <include name="../bin/OpenSim.Servers.dll" />
+                <include name="../bin/XMLRPC.dll" />
             </references>
         </csc>
         <echo message="Copying from [${project::get-base-directory()}/${build.dir}/] to [${project::get-base-directory()}/../bin/" />