CERTDIR specifies the directory as the repository of certificates to be used
Certificate files in the directory are named as follows.
All of these files are optional.
me.pem -- my certificate
The certificate of this DeleGate to be sent to clients (and to servers
It may contain the private-key too.
It can be a chained certificate followed with the certificates of
me-key.pem -- my private-key
This file is necessary if the private-key for me.pem is not
contained in itself.
me-key.pas -- the pass-phrase for my private-key
This file is necessary if the private-key in me-key.pem is
common.pas -- the pass-phrase common to private-keys
This file can be used as the default pass-phrase common to
all encrypted private-keys.