-appropriate for the pathname host HOST, or if not specified the host
-of DEFAULTS. If THING is a string, the parse is bounded by START and
-END, and error behaviour is controlled by JUNK-ALLOWED, as with
-PARSE-NAMESTRING."
+appropriate for the pathname host HOST, or if not specified the
+host of DEFAULTS. If THING is a string, the parse is bounded by
+START and END, and error behaviour is controlled by JUNK-ALLOWED,
+as with PARSE-NAMESTRING. For file systems whose native
+conventions allow directories to be indicated as files, if
+AS-DIRECTORY is true, return a pathname denoting THING as a
+directory."