MFC rev 1.13:

Fix ypwhich -m.  This should be MFC'ed back at least as far as RELENG_5.

Submitted by: Gil Kloepfer <gil@arlut.utexas.edu>
PR:		64445
Approved by:	re (scottl)

include/rpcsvc/yp_prot.h

@@ -148,7 +148,7 @@ struct ypresp_order {
 };
 
 struct ypmaplist {
-	char ypml_name[YPMAXMAP + 1];
+	char *ypml_name;
 	struct ypmaplist *ypml_next;
 };