[MacPorts] #57672: Add DNS CAA record for MacPorts domains

[MacPorts]

#57672: Add DNS CAA record for MacPorts domains
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 Reporter:  ryandesign      |      Owner:  admin@…
     Type:  enhancement     |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  server/hosting  |    Version:
 Keywords:                  |       Port:
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 The ssllabs analysis of our domain suggested that we should add a
 [https://blog.qualys.com/ssllabs/2017/03/13/caa-mandated-by-cabrowser-
 forum CAA] DNS record, which lists which CAs are allowed to issue
 certificates for our domain. I think we're only using Let's Encrypt now,
 so we could just list that. This ticket is a request for comments: Can you
 think of any reason why we shouldn't do this?

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Ticket URL: <https://trac.macports.org/ticket/57672>
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