Load core-os sooner & in all sessions

Indirectly fixes set-env! errors when using it from your init files.

core/core-os.el

@@ -15,6 +15,12 @@
 (defmacro set-env! (&rest _vars)
   "Inject VARS from your shell environment into Emacs.")
 
+;; FIXME obsolete :env
+(def-setting! :env (&rest vars)
+  :obsolete set-env!
+  (when (featurep 'exec-path-from-shell)
+    `(exec-path-from-shell-copy-envs ,@vars)))
+
 (cond (IS-MAC
        (setq mac-command-modifier 'meta
              mac-option-modifier  'alt