If either EASYRSA or EASYRSA_PKI is already defined when searching for
default "$PWD/pki/var" then ignore this default vars file.
If EASYRSA_PKI is defined then do not load a vars file from a different PKI.
If EASYRSA is defined then do not load a vars file from any PKI.
Signed-off-by: Richard T Bonhomme <tincantech@protonmail.com>
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