Neuter OPENSSL_cleanup() redefinition.

Index: src/libs/zbxcomms/tls.c
--- src/libs/zbxcomms/tls.c.orig
+++ src/libs/zbxcomms/tls.c
@@ -30,7 +30,7 @@
 #include "zbxstr.h"
 #include "zbxtime.h"
 
-#if defined(HAVE_OPENSSL) && OPENSSL_VERSION_NUMBER < 0x1010000fL || defined(LIBRESSL_VERSION_NUMBER)
+#if defined(HAVE_OPENSSL) && OPENSSL_VERSION_NUMBER < 0x1010000fL
 /* for OpenSSL 1.0.1/1.0.2 (before 1.1.0) or LibreSSL */
 
 /* mutexes for multi-threaded OpenSSL (see "man 3ssl threads" and example in crypto/threads/mttest.c) */