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/tools/backup/bareos/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, pkgconfig, nettools, gettext, flex
+{ lib, stdenv, fetchFromGitHub, pkgconfig, nettools, gettext, flex
 , readline ? null, openssl ? null, python2 ? null, ncurses ? null, rocksdb
 , sqlite ? null, postgresql ? null, libmysqlclient ? null, zlib ? null, lzo ? null
 , jansson ? null, acl ? null, glusterfs ? null, libceph ? null, libcap ? null
@@ -72,7 +72,7 @@ stdenv.mkDerivation rec {
     "sbindir=\${out}/bin"
   ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     homepage = "http://www.bareos.org/";
     description = "A fork of the bacula project";
     license = licenses.agpl3;