Improve documents about ms_time

And fix typo error

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index 4b3799f..6c75381 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -424,7 +424,7 @@
     "    reconnect=%%d        number of reconnections using session resumption\n" \
     "                        default: 0 (disabled)\n"       \
     "    reco_server_name=%%s  default: NULL\n"             \
-    "    reco_delay=%%d       default: 0 millionseconds\n"         \
+    "    reco_delay=%%d       default: 0 milliseconds\n"         \
     "    reco_mode=%%d        0: copy session, 1: serialize session\n" \
     "                        default: 1\n"      \
     "    reconnect_hard=%%d   default: 0 (disabled)\n"      \