"incomplete type 'BIO_METHOD'"
Likely fixed in a later release, they've switchted to a different upstream for go openssl.
During BSDCan 2018 the intention to update OpenSSL in base to 1.1.x branch was documented.
Intention is to update OpenSSL in 12-STABLE to 1.1.1 when that is released.
Poudriere log: https://keg.brnrd.eu/data/111amd64-default-openssl110/2018-08-17_12h10m13s/logs/errors/mongodb36-tools-3.6.3.log
Still breaks, any progress here?