Index: flag_str.h
===================================================================
--- flag_str.h	(revision 20730)
+++ flag_str.h	(revision 20731)
@@ -75,7 +75,9 @@
 
 /* Given a set of flags for a given object type, return a string which
    can be output to a file.  The returned pointer must not be
-   freed.  */
+   freed. If compat is set, allow some old flags set on new object types
+   which normally won't handle them - this is only for io_pcb, for the
+   transitional period */
 char *pcb_strflg_f2s(pcb_flag_t flags, int object_type, unsigned char *intconn, int compat);