Add authfail_message sudoers option to allow the user to override

the default message of %d incorrect password attempt(s).

plugins/sudoers/def_data.c

@@ -480,6 +480,10 @@ struct sudo_defs_types sudo_defs_table[] = {
 	"timestamp_type", T_TUPLE,
 	N_("Type of authentication timestamp record: %s"),
 	def_data_timestamp_type,
+    }, {
+	"authfail_message", T_STR,
+	N_("Authentication failure message: %s"),
+	NULL,
     }, {
 	NULL, 0, NULL
     }