curl: 7.42.1 -> 7.43.0

pkgs/tools/networking/curl/default.nix

···
 assert c-aresSupport -> c-ares != null;
 
 stdenv.mkDerivation rec {
-  name = "curl-7.42.1";
+  name = "curl-7.43.0";
 
   src = fetchurl {
     url = "http://curl.haxx.se/download/${name}.tar.bz2";
-    sha256 = "11y8racpj6m4j9w7wa9sifmqvdgf22nk901sfkbxzhhy75rmk472";
+    sha256 = "1ycdhp47v8z6y64s7ihi5jl28dzc5w8wqn0wrhy4hc152ahm99ms";
   };
 
   # Zlib and OpenSSL must be propagated because `libcurl.la' contains