Allow username and password to be passed to getdown and then passed along

to Yohoho! to deal with the various hackery that the Chinese need.

src/java/com/threerings/getdown/data/Application.java

@@ -1,5 +1,5 @@
 //
-// $Id: Application.java,v 1.29 2004/08/09 22:01:56 mdb Exp $
+// $Id: Application.java,v 1.30 2004/08/10 07:26:19 mdb Exp $
 
 package com.threerings.getdown.data;
 
@@ -274,6 +274,16 @@ public class Application
             }
         }
 
+        // TODO: make this less of a hack
+        String username = System.getProperty("username");
+        if (!StringUtil.blank(username)) {
+            _jvmargs.add("-Dusername=" + username);
+        }
+        String password = System.getProperty("password");
+        if (!StringUtil.blank(password)) {
+            _jvmargs.add("-Dpassword=" + password);
+        }
+
         // look for custom arguments
         File file = getLocalPath("extra.txt");
         if (file.exists()) {