Support openssl 1.0.2b and above

Newer versions of openssl return a different error with alternate
certificate chains; update for compatibility.

Signed-off-by: Marc Deslauriers <marc.deslauriers@canonical.com>
Bug-Ubuntu: https://bugs.launchpad.net/bugs/1474541
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
1 file changed