botan: mark as insecure

pkgs/development/libraries/botan/generic.nix

@@ -4,6 +4,7 @@
 , sourceExtension ? "tar.xz"
 , extraConfigureFlags ? ""
 , postPatch ? null
+, knownVulnerabilities ? [ ]
 , CoreServices
 , Security
 , ...
@@ -49,6 +50,7 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ raskin ];
     platforms = platforms.unix;
     license = licenses.bsd2;
+    inherit knownVulnerabilities;
   };
   passthru.updateInfo.downloadPage = "http://files.randombit.net/botan/";
 }