FastDL Servers for Sven Co-op

Add this to enable fastDL:

EU
sv_downloadurl "http://dl1.boderman.net/"
Asia
sv_downloadurl "http://dl2.boderman.net/"
USA
sv_downloadurl "http://dl3.boderman.net/"
Amckern runs a publicly available FastDL server containing all 1300+ maps available on SCMapDB.com.
Australia
sv_downloadurl "https://svencoop.ammahls.com/"

FastDL server locations: The Netherlands, Singapore, US-West, Australia.