BZ #59: JBoss exits immediately when running with java binary from OpenJDK

Status fields:

This test exits immediately when running with java binary of OpenJDK, while it works
with the cacao binary:

public class test extends Thread {
    public static void main(String[] argv) throws Throwable {
        Runnable worker = new Runnable() {
                public void run() {
                    try {
                        for (int i = 0; i < 5; i++) {
                            Thread.sleep(1000);
                            System.out.print(".");
                        }
                    }
                    catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            };

        new Thread(worker).start();
    }
}

The problem was that the OpenJDK java binary detaches the main thread from the VM and
there is no non-daemon thread anymore.  But HotSpot attaches the main thread again, as
DestroyJavaVM thread, in DestroyJavaVM.  This changeset implements this behavior:

http://mips.complang.tuwien.ac.at/hg/cacao/rev/5b1738cbdeac