Add DNS-01 challenge end-status at the end of the operation.

When I submit a DNS-01 challenge request, you see the following lines in log.nsf. But the end-result is not set. We need the end-result in the log so we can add a trigger on it whenever it failed. We have push all logs (event driven) to Elastic Search. In here we have triggers that checks on failures and warning. It's fast and dynamical.

Please also echo the end-status of the request to the log.

CertMgr: Processing 1 request(s)

CertMgr: Process ACME Request [LetsEncryptProduction]

CertMgr: Generated ACME AccountKey

CertMgr: Using dns-01 configuration [angioni.nl] for host [angioni.nl]

CertMgr: Waiting 20 seconds before confirming [HTTP-01: 0] [DNS-01: 1] challenge(s) are in place ..

CertMgr: Waited 20 seconds to have challenges in place