Rewrite ‘with pkgs.lib’ -> ‘with lib’

Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.

nixos/modules/services/networking/hostapd.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 
 # TODO:
 #
@@ -9,7 +9,7 @@
 #   wpa_supplicant and hostapd on the same wireless interface doesn't make any sense
 #   perhaps an assertion that there is a dhcp server and a dns server on the IP address serviced by the hostapd?
 
-with pkgs.lib;
+with lib;
 
 let