commit 6737f50490537355382aa208b26ab8704fae3b60
author Maxim Dounin <mdounin@mdounin.ru> Mon Jul 16 17:47:20 2018 +0300
committer Maxim Dounin <mdounin@mdounin.ru> Mon Jul 16 17:47:20 2018 +0300
tree f571025553a6af05f26a8ef773b705835031b277
parent 8364547d29ced3c00f11510817c0796b6b175635

SSL: fixed SSL_clear_options() usage with OpenSSL 1.1.0+.

In OpenSSL 1.1.0 the SSL_CTRL_CLEAR_OPTIONS macro was removed, so
conditional compilation test on it results in SSL_clear_options()
and SSL_CTX_clear_options() not being used.  Notably, this caused
"ssl_prefer_server_ciphers off" to not work in SNI-based virtual
servers if server preference was switched on in the default server.

It looks like the only possible fix is to test OPENSSL_VERSION_NUMBER
explicitly.