[Hyena] Make CryptoUtil.Md5Encode thread-safe
[Hyena] Make CryptoUtil.Md5Encode thread-safe

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

babycaseny/banshee,ixfalia/banshee,allquixotic/banshee-gst-sharp-work,GNOME/banshee,allquixotic/banshee-gst-sharp-work,GNOME/banshee,GNOME/banshee,GNOME/banshee,directhex/banshee-hacks,babycaseny/banshee,lamalex/Banshee,petejohanson/banshee,mono-soc-2011/banshee,petejohanson/banshee,Dynalon/banshee-osx,ixfalia/banshee,allquixotic/banshee-gst-sharp-work,ixfalia/banshee,Dynalon/banshee-osx,stsundermann/banshee,arfbtwn/banshee,GNOME/banshee,Carbenium/banshee,lamalex/Banshee,Carbenium/banshee,directhex/banshee-hacks,ixfalia/banshee,Dynalon/banshee-osx,lamalex/Banshee,mono-soc-2011/banshee,mono-soc-2011/banshee,GNOME/banshee,Dynalon/banshee-osx,stsundermann/banshee,lamalex/Banshee,babycaseny/banshee,Dynalon/banshee-osx,arfbtwn/banshee,allquixotic/banshee-gst-sharp-work,arfbtwn/banshee,ixfalia/banshee,stsundermann/banshee,Carbenium/banshee,dufoli/banshee,stsundermann/banshee,lamalex/Banshee,arfbtwn/banshee,dufoli/banshee,babycaseny/banshee,babycaseny/banshee,petejohanson/banshee,ixfalia/banshee,Dynalon/banshee-osx,stsundermann/banshee,petejohanson/banshee,dufoli/banshee,Carbenium/banshee,directhex/banshee-hacks,Dynalon/banshee-osx,dufoli/banshee,stsundermann/banshee,ixfalia/banshee,dufoli/banshee,Carbenium/banshee,stsundermann/banshee,dufoli/banshee,babycaseny/banshee,directhex/banshee-hacks,babycaseny/banshee,babycaseny/banshee,dufoli/banshee,GNOME/banshee,directhex/banshee-hacks,arfbtwn/banshee,mono-soc-2011/banshee,petejohanson/banshee,Dynalon/banshee-osx,lamalex/Banshee,GNOME/banshee,arfbtwn/banshee,directhex/banshee-hacks,arfbtwn/banshee,mono-soc-2011/banshee,stsundermann/banshee,arfbtwn/banshee,allquixotic/banshee-gst-sharp-work,ixfalia/banshee,Carbenium/banshee,mono-soc-2011/banshee,allquixotic/banshee-gst-sharp-work,dufoli/banshee,petejohanson/banshee,mono-soc-2011/banshee