bind: 9.12.4-P1 -> 9.14.2

9.12 is EOL as of May 2019.

9.14.2 release notes (which appear to extend those for 9.14.1):

https://ftp.isc.org/isc/bind9/9.14.2/RELEASE-NOTES-bind-9.14.2.html

Please check the security fixes and prioritize this as appropriate.

pkgs/servers/dns/bind/default.nix

@@ -8,30 +8,22 @@
 assert enableSeccomp -> libseccomp != null;
 assert enablePython -> python3 != null;
 
-let version = "9.12.4-P1"; in
+let version = "9.14.2"; in
 
 stdenv.mkDerivation rec {
   name = "bind-${version}";
 
   src = fetchurl {
     url = "https://ftp.isc.org/isc/bind9/${version}/${name}.tar.gz";
-    sha256 = "1if7zc5gzrfd28csc63v9bjwrc0rgvm1x9yx058946hc5gp5lyp2";
+    sha256 = "033zqajnj5ys45g899132xkhh9f0hsh76ffv7302wl166xbjfh0f";
   };
 
   outputs = [ "out" "lib" "dev" "man" "dnsutils" "host" ];
 
-  patches = [ ./dont-keep-configure-flags.patch ./remove-mkdir-var.patch ] ++
-    [
-      # Workaround for missing atomic operations on aarch64. Upstream added the
-      # below patch after the release. Can probably be dropped with the next
-      # version.
-      (fetchpatch {
-        name = "client-atomics-as-refcount.patch";
-        url = https://gitlab.isc.org/isc-projects/bind9/commit/d72f436b7d7c697b262968c48c2d7643069ab17f.diff;
-        sha256 = "0sidlab9wcv21751fbq3h9m4wy6hk7frag9ar2jndw8rn3axr2qy";
-      })
-    ] ++
-    stdenv.lib.optional stdenv.isDarwin ./darwin-openssl-linking-fix.patch;
+  patches = [
+    ./dont-keep-configure-flags.patch
+    ./remove-mkdir-var.patch
+  ] ++ stdenv.lib.optional stdenv.isDarwin ./darwin-openssl-linking-fix.patch;
 
   nativeBuildInputs = [ perl ];
   buildInputs = [ libtool libxml2 openssl ]