Add back cnpy.gdn to restore #633

[groundcat]

This PR has been created to re-add cnpy.gdn to the PSL, restoring #633 by reverting the removal PR #2174, as requested by @angelogladding, who is the original requestor of #633:

#2174 (comment)

The DNS failure mentioned in the related issue #2172 may be due to a temporary misconfiguration error, as indicated by the requestor.

[groundcat]

@angelogladding The email address <[email protected]> from your initial submission is invalid, as lahacker.net lacks an MX record. Do you have an updated email address so the project can contact you in similar situations, as in #2172 and #2174?

[simon-friedberger]

I'm merging immediately to keep disruption to a minimum.

@angelogladding make sure to create a follow-up PR and update your information. You need a valid and reachable e-mail address and website, etc. It's all in the PR template.

[angelogladding]

I moved my lahacker.net DNS information in response to this event. You caught it down during the transition. It was, is and will remain available even though my primary e-mail address has changed.

Thank you for readding the domain.

The language in the e-mail I received was "If we do not hear back from you after an extended period, the domain may be subject to removal." I'd recommend stating "two weeks" explicitly in the e-mail. Thank you for volunteering to maintain the list.