FTBFS with OpenSSL 1.1.1

[debalance]

According to https://bugs.debian.org/907055 the transmission test fails when building fast_tls with OpenSSL 1.1.1.
Whatever it is, please either fix the test or fast_tls (or both).

[prefiks]

Hello,

As of d8c5a71 this should be fixed. At least tests passes with libssl1.1.1~pre9 from debian unstable.