treewide: with stdenv.lib; in meta -> with lib;

Part of: https://github.com/NixOS/nixpkgs/issues/108938

meta = with stdenv.lib;

is a widely used pattern. We want to slowly remove
the `stdenv.lib` indirection and encourage people
to use `lib` directly. Thus let’s start with the meta
field.

This used a rewriting script to mostly automatically
replace all occurances of this pattern, and add the
`lib` argument to the package header if it doesn’t
exist yet.

The script in its current form is available at
https://cs.tvl.fyi/depot@2f807d7f141068d2d60676a89213eaa5353ca6e0/-/blob/users/Profpatsch/nixpkgs-rewriter/default.nix

pkgs/development/ocaml-modules/http/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl, ocaml_pcre, ocamlnet, ocaml, findlib, camlp4}:
+{lib, stdenv, fetchurl, ocaml_pcre, ocamlnet, ocaml, findlib, camlp4}:
 
 if stdenv.lib.versionAtLeast ocaml.version "4.06"
 then throw "ocaml-http is not available for OCaml ${ocaml.version}"
@@ -29,7 +29,7 @@ stdenv.mkDerivation {
     make all opt
   '';
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "http://ocaml-http.forge.ocamlcore.org/";
     platforms = ocaml.meta.platforms or [];
     description = "Do it yourself (OCaml) HTTP daemon";