privoxy: 3.0.34 -> 4.0.0

Privoxy 3.0.34 fails with the GCC update
(https://github.com/NixOS/nixpkgs/pull/471587).

Privoxy 4.0.0 seems to build and work fine.

See https://github.com/NixOS/nixpkgs/issues/475479

pkgs/tools/networking/privoxy/default.nix

@@ -16,22 +16,13 @@
 stdenv.mkDerivation rec {
 
   pname = "privoxy";
-  version = "3.0.34";
+  version = "4.0.0";
 
   src = fetchurl {
     url = "mirror://sourceforge/ijbswa/Sources/${version}%20%28stable%29/${pname}-${version}-stable-src.tar.gz";
-    sha256 = "sha256-5sy8oWVvTmFrRlf4UU4zpw9ml+nXKUNWV3g5Mio8XSw=";
+    sha256 = "sha256-wI4roASTBwF7+dimPdKg37lqoM3rNK4Ad3bmPrpiom8=";
   };
 
-  # Patch to fix socks4 and socks4a support under glibc's source fortification
-  # (enabled by default since glibc 2.38-0)
-  patches = [
-    (fetchpatch {
-      url = "https://www.privoxy.org/gitweb/?p=privoxy.git;a=commitdiff_plain;h=19d7684ca10f6c1279568aa19e9a9da2276851f1";
-      sha256 = "sha256-bCb0RUVrWeGfqZYFHXDEEx+76xiNyVqehtLvk9C1j+4=";
-    })
-  ];
-
   nativeBuildInputs = [
     autoreconfHook
     w3m