CAA entries Add multiple entries and issue wild "tag"

[perki]

As per a request of Aminita from EURIS.
The admin panel and config leader only allow one single CAA entry, when an "issue wild" is necessary for most of Pryv's instance.

https://pryvhelp.zendesk.com/agent/tickets/1368

The desired result in dns/conf/dns.json should look like

"certificateAuthorityAuthorization": [{
     "issuer": "sectigo.com"
   },
   {
     "issuer": "sectigo.com",
     "tag": "issuewild"
   }
   ],