Fixed a problem with exporting OPENSSL_NO_NEXTPROTONEG even though they are not availble on LibreSSL.
Patch patch-SSLeay_xs-NO_NPN from Alexander Bluhm.
Patch from Heikki Vatiainen adds support for SSL_set_default_passwd_cb* for
OpenSSL 1.1.0f and later. LibreSSL does not support these functions, at
least yet.
Patch from Heikki Vatiainen adds new functions related to SSL_CTX_new.
Patch from Heikki Vatiainen adds two new functions introduced in OpenSSL 1.1.0, a number
of constants and a couple of const qualifiers to SSLeay.xs. Tests and
documentation .pod were also updated.
Patch from Heikki Vatiainen adds one new OpenSSL 1.1.0 function and has a minor fix for
LibreSSL version detection:

• Added support for SSL_use_certificate_chain_file