[Issue 10039] configure fails to detect SSL_export_keying_material_early with LibreSSL

https://bugs.openldap.org/show_bug.cgi?id=10039

--- Comment #6 from orbea@riseup.net --- Of course, in the event OpenLDAP starts using functionality which works in OpenSSL, but not LiberSSL I will report it to OpenBSD. They also use OpenLDAP so they will have direct incentive to fix it. Although I can understand they do not currently have plans to implement SSL_export_keying_material() when there do not seem to be many users of this function while there are other functions projects other than OpenLDAP could benefit from having. The last few releases LibreSSL has made significant progress in bridging the gap with OpenSSL and hopefully that trend will continue.