[th/cloud-setup-man] extend manual page for nm-cloud-setup
Part two for https://bugzilla.redhat.com/show_bug.cgi?id=1867997 .
It is allow a follow up to !701 (closed) and #600 (closed)
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Part two for https://bugzilla.redhat.com/show_bug.cgi?id=1867997 .
It is allow a follow up to !701 (closed) and #600 (closed)