Comment 8 for bug 1756587

Verification-done on bionic: netplan.io 0.36.2
Verification-done on artful: nplan 0.32~17.10.4
Verification-done on xenial: nplan 0.32~16.04.5

The updated documentation is available in the SRU'ed packages:

"""
[...] Unless otherwise specified, parameter values for time intervals should be expressed in milliseconds, but can also be expressed in seconds using a time suffix (such as "s" for seconds, "ms" for milliseconds).
"""

"""
              forward-delay (scalar)
                     Specify the period of time (in seconds) the bridge will remain in Listening and Learning states before getting to the
                     Forwarding state. This field maps to the ForwardDelaySec= property for the networkd renderer.
"""