treewide: add version to packages

Lots of packages are missing versions in their name. This adds them
where appropriate. These were found with this command:

 $ nix-env -qa -f. | grep -v '\-[0-9A-Za-z.-_+]*$' | grep -v '^hook$'

See issue #41007.

pkgs/tools/networking/dnstracer/default.nix

@@ -2,10 +2,10 @@
 
 stdenv.mkDerivation rec {
   version = "1.9";
-  name = "dnstracer";
+  name = "dnstracer-${version}";
 
   src = fetchurl {
-    url = "http://www.mavetju.org/download/dnstracer-${version}.tar.gz";
+    url = "http://www.mavetju.org/download/${name}.tar.gz";
     sha256 = "177y58smnq2xhx9lbmj1gria371iv3r1d132l2gjvflkjsphig1f";
   };