Allow the output stream to be overridden just like the input stream on the config registry.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5481 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/admin/server/ConfigRegistry.java

@@ -29,6 +29,7 @@ import java.util.HashMap;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 
 import com.samskivert.io.ByteArrayOutInputStream;
 import com.samskivert.util.StringUtil;
@@ -138,6 +139,14 @@ public abstract class ConfigRegistry
         return new ObjectInputStream(bin);
     }
 
+    /**
+     * Create an ObjectOutputStream to write serialized config entries.
+     */
+    protected ObjectOutputStream createObjectOutputStream (OutputStream bin)
+    {
+        return new ObjectOutputStream(bin);
+    }
+
     /**
      * Contains all necessary info for a configuration object registration.
      */