Comment 9 for bug 1825712

Disco verification:

First, reproducing the bug:
ubuntu@disco-bind-1825712:~$ apt-cache policy bind9
bind9:
  Installed: 1:9.11.5.P1+dfsg-1ubuntu2.3
  Candidate: 1:9.11.5.P1+dfsg-1ubuntu2.3
  Version table:
 *** 1:9.11.5.P1+dfsg-1ubuntu2.3 500
        500 http://br.archive.ubuntu.com/ubuntu disco-updates/main amd64 Packages

Offline test:
ubuntu@disco-bind-1825712:~$ dnssec-keygen -a ED25519 example.com
dnssec-keygen: fatal: unsupported algorithm: 15

Online test returns "unsigned answer", as expected:
ubuntu@disco-bind-1825712:~$ delv +dnssec +multiline @127.0.0.1 ed25519.nl
;; validating ed25519.nl/A: no valid signature found
; unsigned answer
ed25519.nl. 3600 IN A 77.72.150.82
ed25519.nl. 3200171710 IN RRSIG A 15 2 3600 (
    20190523000000 20190502000000 27662 ed25519.nl.
    3y59a9G5rk/CMh36BPqonn2NjILp12SDmeQGloaUD5go
    e5A+Q6TsD7fDU9Bj3DtP6SqBturCFCxcUDzLeCp4AQ== )

Now with the updated packages:
ubuntu@disco-bind-1825712:~$ apt-cache policy bind9
bind9:
  Installed: 1:9.11.5.P1+dfsg-1ubuntu2.4
  Candidate: 1:9.11.5.P1+dfsg-1ubuntu2.4
  Version table:
 *** 1:9.11.5.P1+dfsg-1ubuntu2.4 500
        500 http://br.archive.ubuntu.com/ubuntu disco-proposed/main amd64 Packages

Offline test succeeds:
ubuntu@disco-bind-1825712:~$ dnssec-keygen -a ED25519 example.com
Generating key pair.
Kexample.com.+015+18445

Online test returns "fully validated":
ubuntu@disco-bind-1825712:~$ delv +dnssec +multiline @127.0.0.1 ed25519.nl
; fully validated
ed25519.nl. 3600 IN A 77.72.150.82
ed25519.nl. 3600 IN RRSIG A 15 2 3600 (
    20190523000000 20190502000000 27662 ed25519.nl.
    3y59a9G5rk/CMh36BPqonn2NjILp12SDmeQGloaUD5go
    e5A+Q6TsD7fDU9Bj3DtP6SqBturCFCxcUDzLeCp4AQ== )

Disco verification succeeded.