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For GPG mode, added a new access.conf variable "GPG_ALLOW_NO_PW" to make it possible to leverage a server-side GPG key pair that has no associated password. This comes in handy when a system requires the user to leverage gpg-agent / pinentry which can present a problem in automated environments as required by the fwknopd server. Now, it might seem like a problem to remove the passphrase from a GPG key pair, but it's important to note that simply doing this is little worse than storing the passphrase in the clear on disk anyway in the access.conf file. Further, this link help provides additional detail: http://www.gnupg.org/faq/GnuPG-FAQ.html#how-can-i-use-gnupg-in-an-automated-environment