Issue 50747 - Port readnsstate to dsctl
Description: Port the legacy tool readnsstate to dsctl, and add a healthcheck
for local and remote offset that are close to triggering
replication time skew errors
relates: https://pagure.io/389-ds-base/issue/50747
Reviewed by: tbordaz(Thanks!)
Revise lint messages per Thierry's requests
adjust skew calculation
Update man page