Fix memory leak with not freeing OpenSSL errors

Author: bukka

ext/openssl/openssl.c

@@ -1277,6 +1277,10 @@ PHP_MSHUTDOWN_FUNCTION(openssl)
 {
 EVP_cleanup();
 
+#if OPENSSL_VERSION_NUMBER >= 0x00090805f
+ERR_free_strings();
+#endif
+
 php_unregister_url_stream_wrapper("https" TSRMLS_CC);
 php_unregister_url_stream_wrapper("ftps" TSRMLS_CC);