- Add contrib/make_welist_txt.sh to print the _welist-key TXT
name, value and BIND zone line for a domain and Ed25519 key
- Accept a private/public PEM file or an existing base64 SPKI DER
- Generate private_key.pem and public_key.pem when the key argument
is omitted, reusing an existing private key
- Document the helper in docs/10_dnssec_key_publishing.md
