Message9496

Current failures:

    [exec] 18 fails unexpected:
    [exec]     test_bat_jy test_chdir test_httpservers test_import test_netrc
    [exec]     test_py_compile test_runpy test_select test_select_new test_socket
    [exec]     test_ssl test_subprocess_jy test_sys_jy test_tarfile
    [exec]     test_threading test_univnewlines test_urllib2 test_zipfile

Socket related tests are still flaky, and seem to got more so with the upgrade to Netty 4.0.25 (different timing apparently). test_chdir is mostly because of fixes for #1658, and can be easily fixed. (None of the failures in test_chdir are really interesting, it's just a question of canonical paths on Windows.) Still more work to investigate the rest.