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Description of problem:
Upstream system test dnssec is failing on RHEL-8.0.0. 

Version-Release number of selected component (if applicable):
bind-9.11.4-1.P2.el7.x86_64

How reproducible:
always

Steps to Reproduce:
1. key1=$(dnssec-keygen -a ED448 testkey)
2. dnssec-settime -P now+3d $key1
3.

Actual results:
dnssec-settime: fatal: Invalid keyfile Ktestkey.+016+13511: failure

Expected results:
Similar to -a ED25519:
./Ktestkey.+015+15805.key
./Ktestkey.+015+15805.private

Additional info:
Known issue upstream [1]. ED448 implementation is broken and not interoperable. They disabled it for now, we should too.

Test in bin/tests/system/dnssec is failing because of this issue.

1. https://gitlab.isc.org/isc-projects/bind9/issues/225

ED448 is fixed on upstream release, there is no need to disable it once it is fixed. Rebase to fixed version would fix the issue better than disabled.

Fixed by upstream rebase

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2020:1845