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/servers/squid/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, perl, openldap, pam, db, cyrus_sasl, libcap
+{ lib, stdenv, fetchurl, perl, openldap, pam, db, cyrus_sasl, libcap
 , expat, libxml2, openssl, pkgconfig
 }:
 
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
     "--enable-x-accelerator-vary"
   ] ++ stdenv.lib.optional (stdenv.isLinux && !stdenv.hostPlatform.isMusl) "--enable-linux-netfilter";
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "A caching proxy for the Web supporting HTTP, HTTPS, FTP, and more";
     homepage = "http://www.squid-cache.org";
     license = licenses.gpl2;