Tweak -^2 output to include extension info for xcsv formats.
#
DESCRIPTION Microsoft Streets and Trips 2002-2005
+EXTENSION txt
+
#
# FILE LAYOUT DEFINITIIONS:
svp[i] = xcalloc(1, sizeof **svp);
svp[i]->name = svec->name;
svp[i]->vec = xmalloc(sizeof(*svp[i]->vec));
+ svp[i]->extension = xcsv_file.extension;
*svp[i]->vec = *vec_list[0].vec; /* Interits xcsv opts */
/* Reset file type to inherit ff_type from xcsv for everything
* except the xcsv format itself, which we leave as "internal"