;; Variables are looked up starting in the home (or explicitly specified)
;; section, then proceeding to the parents assigned to `@PARENTS'.
;; (`@PARENTS' usually defaults to `@COMMON'; the parent of `@COMMON' is
-;; `@BUILTIN'; `@BUILTIN' and `@CONFIG' have no parents.)
+;; `@BUILTIN'; `@BUILTIN' and `@ENV' have no parents.)
;;
;; At top-level, the text is split into words at whitespace, unless prevented
;; by double- and single-quote, or escaped by `\'. Within single quotes, all