PDNS checks that when a `CNAME` rrset is created that no other rrset of
the same name but a different rtype exists. When changing a record type
to `CNAME`, PDA will send two operations in one api call to PDNS: A
deletion of the old rrset, and the addition of the new rrset. For the
check in PDNS to pass, the deletion needs to happen before the addition.
Before PR #1201 that was the case, the first api call did deletions and
the second handled additions and changes. Currently the api payload
contains additions first and deletions last. PDNS applies these in the
order they are passed in the payload to the api, so to restore the
original/correct/working behaviour the order of operations in the api
payload has to be reversed.
fixes#1251
Starting with the very first commit, the update was always done with
two api calls: one for DELETE and one for REPLACE. It is however
perfectly valid and save to do both at once, which makes it atomic, so
no need for the rollback. Plus it only updates the serial once.
There is no point in sending the full RRset data when deleting it, the
key attributes to identify it are enough. This also make the behaviour
consistent with the api docs [0] where it says "MUST NOT be included
when changetype is set to DELETE."
[0] https://doc.powerdns.com/authoritative/http-api/zone.html#rrset
* Previously having characters like "ü" in the SOA wouldnt allow to push
updates to the domain
* Also use the new method to_idna to support characters like "ß"
The new setting 'verify_ssl_connections' tells the requests library to
verify secured outgoing HTTP connections.
Usually verifying is desired and helps to reveal configuration
problems. It also disables an ugly warning when HTTPS connections
are made without verification.
