+/* 2005-02-19 SMS.
+ Select an appropriate "orig" suffix and a separator character for
+ adding a unique suffix to a file name.
+
+ A VMS ODS2 file system can not tolerate multiple dots. An ODS5 file
+ system can, but even there not all dots are equal, and heroic effort
+ would be needed to get ".html^.orig" rather than (the less desirable)
+ "^.html.orig". It's more satisfactory always to use "_orig" on VMS
+ (rather than including "vms.h", testing "ods5_dest", and acting
+ accordingly).
+
+ Note that code in various places assumes that this string is five
+ characters long.
+*/
+# ifdef __VMS
+# define ORIG_SFX "_orig"
+# else /* def __VMS */
+# define ORIG_SFX ".orig"
+# endif /* def __VMS [else] */
+
+/* ".NNN" unique-ifying suffix separator character for unique_name() in
+ url.c (and anywhere else). Note that on VMS, the file system's
+ version numbers solve the problem that unique_name() is designed to
+ handle, obviating this whole exercise. Other systems may specify a
+ character different from "." here, if desired.
+*/
+# ifndef __VMS
+# define UNIQ_SEP '.'
+# endif /* ndef __VMS */
+