Make CryptoUtil.Md5Encode thread-safe
Make CryptoUtil.Md5Encode thread-safe

Signed-off-by: Gabriel Burt <ce11a5f747b579a775c140646376daaba8c3eb7d@gmail.com>

dufoli/hyena,GNOME/hyena,petejohanson/hyena,petejohanson/hyena,arfbtwn/hyena,arfbtwn/hyena,GNOME/hyena,dufoli/hyena