knot-resolver: 5.1.3 -> 5.2.0

https://lists.nic.cz/pipermail/knot-resolver-users/2020/000318.html

NixOS service: we'll probably want to switch listenDoH
to the new 'doh2' kind, but let me leave that for later.

pkgs/servers/dns/knot-resolver/default.nix

@@ -16,11 +16,11 @@ lua = luajitPackages;
 
 unwrapped = stdenv.mkDerivation rec {
   pname = "knot-resolver";
-  version = "5.1.3";
+  version = "5.2.0";
 
   src = fetchurl {
     url = "https://secure.nic.cz/files/knot-resolver/${pname}-${version}.tar.xz";
-    sha256 = "20cd829027e39a9f7d993894e3640e886825b492d9ac1a744ac5616cc101458b";
+    sha256 = "8824267ca3331fa06d418c1351b68c648da0af121bcbc84c6e08f5b1e28d9433";
   };
 
   outputs = [ "out" "dev" ];
@@ -67,6 +67,7 @@ unwrapped = stdenv.mkDerivation rec {
   postInstall = ''
     rm "$out"/lib/libkres.a
     rm "$out"/lib/knot-resolver/upgrade-4-to-5.lua # not meaningful on NixOS
+    rm -r "$out"/lib/sysusers.d/ # ATM more likely to harm than help
   '';
 
   doInstallCheck = with stdenv; hostPlatform == buildPlatform;