Increase the socket timeout.

h2/src/tools/org/h2/build/doc/UploadBuild.java

@@ -43,6 +43,7 @@ public class UploadBuild {
      * @param args the command line parameters
      */
     public static void main(String... args) throws Exception {
+        System.setProperty("h2.socketConnectTimeout", "30000");
         byte[] data = IOUtils.readBytesAndClose(new FileInputStream("coverage/index.html"), -1);
         String index = new String(data, "ISO-8859-1");
         while (true) {