ldns: 1.7.0 -> 1.7.1

https://www.nlnetlabs.nl/news/2019/Jul/26/ldns-1.7.1-released/

* examples no longer can be configured separately,
  so build everything we want in a single go
  and sort into the appropriate outputs after.
* libtool file doesn't seem to reference openssl at all
  so nothing to patch up there as we did previously.

pkgs/development/libraries/ldns/default.nix

@@ -1,29 +1,14 @@
-{ stdenv, fetchurl, fetchpatch, openssl, perl, which, dns-root-data }:
+{ stdenv, fetchurl, openssl, perl, which, dns-root-data }:
 
 stdenv.mkDerivation rec {
   pname = "ldns";
-  version = "1.7.0";
+  version = "1.7.1";
 
   src = fetchurl {
     url = "https://www.nlnetlabs.nl/downloads/ldns/${pname}-${version}.tar.gz";
-    sha256 = "1k56jw4hz8njspfxcfw0czf1smg0n48ylia89ziwyx5k9wdmp7y1";
+    sha256 = "0ac242n7996fswq1a3nlh1bbbhrsdwsq4mx7xq8ffq6aplb4rj4a";
   };
 
-  patches = [
-    (fetchpatch {
-      name = "CVE-2017-1000231.patch";
-      url = "https://git.nlnetlabs.nl/ldns/patch/?id=c8391790";
-      sha256 = "1rprfh0y1c28dqiy3vgwvwdhn7b5rsylfzzblx5xdhwfqgdw8vn0";
-      excludes = [ "Changelog" ];
-    })
-    (fetchpatch {
-      name = "CVE-2017-1000232.patch";
-      url = "https://git.nlnetlabs.nl/ldns/patch/?id=3bdeed02";
-      sha256 = "0bv0s5jjp0sswfg8da47d346iwp9yjhj9w7fa3bxh174br0zj07r";
-      excludes = [ "Changelog" ];
-    })
-  ];
-
   postPatch = ''
     patchShebangs doc/doxyparse.pl
   '';
@@ -38,6 +23,7 @@ stdenv.mkDerivation rec {
     "--with-trust-anchor=${dns-root-data}/root.key"
     "--with-drill"
     "--disable-gost"
+    "--with-examples"
   ] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "ac_cv_func_malloc_0_nonnull=yes"
     "ac_cv_func_realloc_0_nonnull=yes"
@@ -47,16 +33,11 @@ stdenv.mkDerivation rec {
   doCheck = false; # fails. missing some files
 
   postInstall = ''
+    # Only 'drill' stays in $out
+    # the rest are examples:
+    moveToOutput "bin/ldns*" "$examples"
+    # with exception of ldns-config, which goes to $dev:
     moveToOutput "bin/ldns-config" "$dev"
-
-    pushd examples
-    configureFlagsArray+=( "--bindir=$examples/bin" )
-    configurePhase
-    make
-    make install
-    popd
-
-    sed -i "$out/lib/libldns.la" -e "s,-L${openssl.dev},-L${openssl.out},g"
   '';
 
   meta = with stdenv.lib; {