According to the linked BZ, machined expects either valid
hostname or valid FQDN. While in case of multiple dots, a
trailing one doesn't violate FQDN, it does violate the rule in
case of something simple, like "domain.". But it's safe to remove
it in both cases.
Resolves:
https://bugzilla.redhat.com/show_bug.cgi?id=1721804
In the end, I've cloned the bug. The new URL is: