-available for use in that function, and which are documented.
-
-This API is also used for functions called by the ${dlfunc expansion item. */
+available for use in that function, and which are documented. That source
+should first #define LOCAL_SCAN
+
+This API is also used for functions called by the ${dlfunc expansion item.
+Source for those should first #define DLFUNC_IMPL and then include this file.
+Coders of dlfunc routines should read the notes on tainting at the start of
+store.c
+*/