upstream: lots of things were relying on libcrypto headers to

transitively include various system headers (mostly stdlib.h); include them
explicitly

OpenBSD-Commit-ID: 5b522f4f2d844f78bf1cc4f3f4cc392e177b2080
diff --git a/ssh_api.c b/ssh_api.c
index 5750997..255adc6 100644
--- a/ssh_api.c
+++ b/ssh_api.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh_api.c,v 1.15 2019/01/21 10:38:54 djm Exp $ */
+/* $OpenBSD: ssh_api.c,v 1.16 2019/09/06 04:53:27 djm Exp $ */
 /*
  * Copyright (c) 2012 Markus Friedl.  All rights reserved.
  *
@@ -17,6 +17,11 @@
 
 #include "includes.h"
 
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
 #include "ssh_api.h"
 #include "compat.h"
 #include "log.h"