cacert: add output "unbundled"

which contains all certs, each in a separate file.
This output is not installed by default.

pkgs/data/misc/cacert/default.nix

@@ -20,6 +20,8 @@ stdenv.mkDerivation rec {
 
   src = nss.src;
 
+  outputs = [ "out" "unbundled" ];
+
   nativeBuildInputs = [ python ];
 
   configurePhase = ''
@@ -50,6 +52,10 @@ stdenv.mkDerivation rec {
   installPhase = ''
     mkdir -pv $out/etc/ssl/certs
     cp -v ca-bundle.crt $out/etc/ssl/certs
+    # install individual certs in unbundled output
+    mkdir -pv $unbundled/etc/ssl/certs
+    cp -v *.crt $unbundled/etc/ssl/certs
+    rm -f $unbundled/etc/ssl/certs/ca-bundle.crt  # not wanted in unbundled
   '';
 
   setupHook = ./setup-hook.sh;