ipxe: 20170922 -> 20180220

pkgs/tools/misc/ipxe/default.nix

···
 }:
 
 let
-  date = "20170922";
-  rev = "74d90b33f8490adcee2026ece18d8411d93b6a39";
+  date = "20180220";
+  rev = "47849be3a900c546cf92066849be0806f4e611d9";
 in
 
 stdenv.mkDerivation {
···
 
   src = fetchgit {
     url = git://git.ipxe.org/ipxe.git;
-    sha256 = "12ijrq451fj2x3i7c7xjlxig5mwbhmgzqjvmfl2sza953vfbk4vw";
+    sha256 = "1f4pi1dp2zqnrbfnggnzycfvrxv0bqgw73dxbyy3hfy4mhdj6z45";
     inherit rev;
   };