Merge branch vcunat@NixOS:p/stdenv (close #1840)

This branch contains a collection of stdenv-changing updates.
There's glibc 2.18 -> .19 bump and many non-intrusive PRs.

The grsecurity branch #1187 got removed at Eelco's request,
see https://github.com/NixOS/nixpkgs/issues/1840#issuecomment-39327023

pkgs/development/tools/misc/texinfo/5.2.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ncurses, perl, xz }:
+{ stdenv, fetchurl, ncurses, perl, xz, interactive ? false }:
 
 stdenv.mkDerivation rec {
   name = "texinfo-5.2";
@@ -8,7 +8,8 @@ stdenv.mkDerivation rec {
     sha256 = "1njfwh2z34r2c4r0iqa7v24wmjzvsfyz4vplzry8ln3479lfywal";
   };
 
-  buildInputs = [ ncurses perl xz ];
+  buildInputs = [ perl xz ]
+    ++ stdenv.lib.optional interactive ncurses;
 
   preInstall = ''
     installFlags="TEXMF=$out/texmf-dist";