Ensure Async is deinited properly

The global thread local keys were not being deinited properly in async.
Reviewed-by: NRich Salz <rsalz@openssl.org>

crypto/async/async.c

@@ -351,8 +351,6 @@ int async_init(void)
     return 1;
 }
 
-/* TODO: FIXME: This needs to be called by something!!! */
-void async_deinit(void);
 void async_deinit(void)
 {
     CRYPTO_THREAD_cleanup_local(&ctxkey);

crypto/include/internal/async.h

@@ -58,4 +58,5 @@
 #include <openssl/async.h>
 
 int async_init(void);
+void async_deinit(void);
 

crypto/init.c

@@ -580,6 +580,16 @@ void OPENSSL_cleanup(void)
         COMP_zlib_cleanup();
     }
 
+#ifndef OPENSSL_NO_ASYNC
+    if (async_inited) {
+# ifdef OPENSSL_INIT_DEBUG
+        fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
+                        "async_deinit()\n");
+# endif
+        async_deinit();
+    }
+#endif
+
 #ifndef OPENSSL_NO_ENGINE
     if (engine_inited) {
 # ifdef OPENSSL_INIT_DEBUG