- New CLI param: --extended-key-usage <string>
- When --extended-key-usage is defined:
1. Set [v3_req]extendedKeyUsage to the provided value.
2. Store the value in domain conf Le_ExtKeyUse for reuse.
reduce TTL for the TXT record from 3600 to 300 to have an easier way to replicate changes for the dns-verification in case multiple submissions for a specific record/domain are done within an hour.