Additional permission under GPLv3 section 7:

If you modify this Program, or any covered work, by linking or
combining it with OpenSSL, or a modified version of OpenSSL licensed
under the OpenSSL license
(https://www.openssl.org/source/license.html), the licensors of this
Program grant you additional permission to convey the resulting
work. Corresponding Source for a non-source form of such a
combination shall include the source code for the parts that are
licensed under the OpenSSL license as well as that of the covered
work.