util.{hh,cc}: Split out users.{hh,cc}

Change-Id: I1bd92479a2cb7e5c2c2e1541b80474adb05ea0df

src/libexpr/eval-cache.cc

@@ -1,8 +1,8 @@
 #include "eval-cache.hh"
 #include "sqlite.hh"
 #include "eval.hh"
-#include "eval-inline.hh"
 #include "store-api.hh"
+#include "users.hh"
 
 namespace nix::eval_cache {
 

src/libexpr/eval-settings.cc

@@ -1,6 +1,7 @@
+#include "file-system.hh"
 #include "globals.hh"
 #include "profiles.hh"
-#include "eval.hh"
+#include "users.hh"
 #include "eval-settings.hh"
 
 namespace nix {

src/libexpr/flake/config.cc

@@ -1,5 +1,5 @@
 #include "flake.hh"
-#include "globals.hh"
+#include "users.hh"
 #include "fetch-settings.hh"
 
 #include <nlohmann/json.hpp>

src/libexpr/parser.y

@@ -19,7 +19,7 @@
 #include <variant>
 
 #include "finally.hh"
-#include "util.hh"
+#include "users.hh"
 
 #include "nixexpr.hh"
 #include "eval.hh"