Fix a comment

Fix an out of date reference to old state machine code in a comment

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/ssl/statem/statem.c b/ssl/statem/statem.c
index f0b3260..5032c3b 100644
--- a/ssl/statem/statem.c
+++ b/ssl/statem/statem.c
@@ -378,7 +378,7 @@
                 goto end;
             } else {
                 /*
-                 * s->state == SSL_ST_RENEGOTIATE, we will just send a
+                 * st->state == MSG_FLOW_RENEGOTIATE, we will just send a
                  * HelloRequest
                  */
                 s->ctx->stats.sess_accept_renegotiate++;