EVP_MD_CTX_create issues

At least on Jenkins a virtual machine has a problem with EVP_MD_CTX_create:

[2020-11-18T19:14:11.131Z] [ RUN      ] NSEC3HashTest.calculate
[2020-11-18T19:14:11.131Z] ld-elf.so.1: /usr/home/jenkins/workspace/kea-dev/ut-thread/src/lib/cryptolink/.libs/libkea-cryptolink.so.5: Undefined symbol "EVP_MD_CTX_create"

This shows a problem with the OpenSSL library which should have been detected in configure. As it can happen too in production I propose to address this. The first step should be to identify the virtual machine and its system.

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