The `org.osbuild.chrony` stage currently supports only a single option
'timeservers' which does not allow specifying additional options for the
configured timeservers. The option can not be easily extended to allow
specifying additional options and at the same time keep the backward
compatibility with old manifests.
The need for a lower-level stage option allowing to configure additional
options of the 'server' directive is required by RHEL AMI images, which
use 'maxpoll', 'minpoll' and 'prefered' options.
Extend the `org.osbuild.chrony` stage with two additional options. The
'servers' option accepts a list of dictionaries specifying timeservers
to be configured using the 'server' directive, including a subset of the
directive options. The 'servers' option can not be used at the same time
in the stage options as the 'timeservers' option.
The second added option is 'leapsectz' corresponding with a directive of
the same name. The value of the option is a string. If the provided
string is empty, then all occurrences of the 'leapsectz' directive are
removed from the `chrony.conf`. Otherwise, the 'leapsectz' directive is
added to the `chrony.conf` with the provided value, while all original
occurrences of the option are removed.
Add a new stage test case under `test/data/stages/chrony-servers` to
test the new variant of the stage options. The reason is that the
'timeservers' option conflicts with 'servers' option, which makes it
impossible to test both of them in the same test case.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
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