Change more packages from direct downloads to mirror://sourceforge

pkgs/applications/audio/csound/default.nix

···
   enableParallelBuilding = true;
 
   src = fetchurl {
-    url = http://netcologne.dl.sourceforge.net/project/csound/csound5/csound5.18/Csound5.18.02.tar.gz;
+    url = mirror://sourceforge/csound/Csound5.18.02.tar.gz;
     sha256 = "4c461cf3bf60b83671224949dd33805379b7121bf2c0ad6af5e191e7f6f8adc8";
   };
 

pkgs/applications/editors/bvi/default.nix

···
   name = "bvi-1.3.2";
 
   src = fetchurl {
-    url = http://prdownloads.sourceforge.net/bvi/bvi-1.3.2.src.tar.gz;
+    url = mirror://sourceforge/bvi/bvi-1.3.2.src.tar.gz;
     sha256 = "110wxqnyianqamxq4y53drqqxb9vp4k2fcvic45qggvlqkqhlfgz";
   };
 

pkgs/applications/networking/instant-messengers/carrier/2.5.0.nix

···
 in
 rec {
   src = fetchurl {
-    url = http://downloads.sourceforge.net/funpidgin/carrier-2.5.0.tar.bz2;
+    url = mirror://sourceforge/funpidgin/carrier-2.5.0.tar.bz2;
     sha256 = "0m80s7hnvz5vc2dy3xiy1zfb6incmb7p28zahzxdif2vz44riz28";
   };
 

pkgs/applications/science/geometry/drgeo/default.nix

···
 let version = lib.attrByPath ["version"] "1.1.0" args; in
 rec {
   src = fetchurl {
-    url = http://downloads.sourceforge.net/ofset/drgeo-1.1.0.tar.gz;
+    url = mirror://sourceforge/ofset/drgeo-1.1.0.tar.gz;
     sha256 = "05i2czgzhpzi80xxghinvkyqx4ym0gm9f38fz53idjhigiivp4wc";
   };
 

pkgs/development/libraries/ctl/default.nix

···
   name = "ctl-1.4.1";
 
   src = fetchurl {
-    url = http://surfnet.dl.sourceforge.net/sourceforge/ampasctl/ctl-1.4.1.tar.gz;
+    url = mirror://sourceforge/ampasctl/ctl-1.4.1.tar.gz;
     sha256 = "16lzgbpxdyhykdwndj1i9vx3h4bfkxqqcrvasvgg70gb5raxj0mj";
   };
 

pkgs/tools/graphics/dmtx/default.nix

···
 in
 rec {
   src = fetchurl {
-    url = "http://prdownloads.sourceforge.net/libdmtx/libdmtx-${version}.tar.bz2";
+    url = "mirror://sourceforge/libdmtx/libdmtx-${version}.tar.bz2";
     sha256 = "0iin2j3ad7ldj32dwc04g28k54iv3lrc5121rgyphm7l9hvigbvk";
   };
 

pkgs/tools/security/clamav/default.nix

···
   version = "0.97.5";
 
   src = fetchurl {
-    url = "http://tenet.dl.sourceforge.net/project/clamav/clamav/${version}/clamav-${version}.tar.gz";
+    url = "mirror://sourceforge/clamav/clamav-${version}.tar.gz";
     sha256 = "039wm64wl2sx7k019g5ll5dkdlsq64fnd0ng0s00pjn8bqd5wv6v";
   };
 

pkgs/tools/text/cheetah-template/2.0.1.nix

···
 args : with args; 
 rec {
   src = fetchurl {
-    url = http://downloads.sourceforge.net/cheetahtemplate/Cheetah-2.0.1.tar.gz;
+    url = mirror://sourceforge/cheetahtemplate/Cheetah-2.0.1.tar.gz;
     sha256 = "134k4s5f116k23vb7wf9bynlx3gf0wwl7y0zp9ciz0q66nh1idkh";
   };