chore: override openssl_1_1 derivation

And remove the `meta.knownVulnerabilities`

Author: drupol

pkgs/phps.nix

@@ -124,6 +124,10 @@ let
   mkPhp = args: prev.callPackage generic (_mkArgs args);
 in
 {
+  openssl_1_1 = prev.openssl_1_1.overrideAttrs (old: {
+    meta = [];
+  });
+
   php56 = import ./php/5.6.nix { inherit prev mkPhp; };
 
   php70 = import ./php/7.0.nix { inherit prev mkPhp; };