Create a certificate authority list
This procedure allows you to create a certificate authority list using the openssl command.
Concatenate all certificate authorities by order of importance,
listing the most important first:
$ openssl x509 -in MyCA1.crt -text >> CAList.pem
$ openssl x509 -in MyCA2.crt -text >> CAList.pem
$ openssl x509 -in MyCA3.crt -text >> CAList.pem