usr.bin/cut errx correctness

[Laurent Ghigonis]

the -b option can cause those messages too

Index: usr.bin/cut/cut.c
===================================================================
RCS file: /cvs/src/usr.bin/cut/cut.c,v
retrieving revision 1.14
diff -u -r1.14 cut.c
--- usr.bin/cut/cut.c   27 Oct 2009 23:59:37 -0000      1.14
+++ usr.bin/cut/cut.c   20 Jan 2010 21:03:48 -0000
@@ -154,11 +154,11 @@
                        }
                }
                if (*p)
-                       errx(1, "[-cf] list: illegal list value");
+                       errx(1, "[-bcf] list: illegal list value");
                if (!stop || !start)
-                       errx(1, "[-cf] list: values may not include zero");
+                       errx(1, "[-bcf] list: values may not include zero");
                if (stop > _POSIX2_LINE_MAX)
-                       errx(1, "[-cf] list: %d too large (max %d)",
+                       errx(1, "[-bcf] list: %d too large (max %d)",
                            stop, _POSIX2_LINE_MAX);
                if (maxval < stop)
                        maxval = stop;