Fix help string in ssl_client2.c
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 2bb8354..960412a 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -159,7 +159,7 @@
 
 #if defined(MBEDTLS_SSL_CBC_RECORD_SPLITTING)
 #define USAGE_RECSPLIT \
-    "    recplit=%%d          default: (library default)\n"
+    "    recsplit=0/1        default: (library default: on)\n"
 #else
 #define USAGE_RECSPLIT
 #endif