Merge staging into closure-size

The most complex problems were from dealing with switches reverted in
the meantime (gcc5, gmp6, ncurses6).
It's likely that darwin is (still) broken nontrivially.

pkgs/development/libraries/libmicrohttpd/default.nix

@@ -1,11 +1,11 @@
 { lib, stdenv, fetchurl, libgcrypt }:
 
 stdenv.mkDerivation rec {
-  name = "libmicrohttpd-0.9.43";
+  name = "libmicrohttpd-0.9.44";
 
   src = fetchurl {
     url = "mirror://gnu/libmicrohttpd/${name}.tar.gz";
-    sha256 = "17q6v5q0jpg57vylby6rx1qkil72bdx8gij1g9m694gxf5sb6js1";
+    sha256 = "07j1p21rvbrrfpxngk8xswzkmjkh94bp1971xfjh1p0ja709qwzj";
   };
 
   outputs = [ "dev" "out" "docdev" ];