Open ended policy

[S-eb]

Is your feature request related to a problem? Please describe.

Some cities express the need to define a policy without an end date. For example: "speed is limited to 10 mph in a given area."
It is expected that speed will be limited to 10 mph until further notice, so no end date is defined per se.
The current MDS policy implementation imposes

• to publish an end date using an arbitrary date;
• once the policy needs to change, to replace this policy with a new one with a revised end date

Describe the solution you'd like

To achieve the need above, it may be interesting to allow the creation of policy without and end_date (the semantic to be used can be further refined) and allow in a second step to set an end_date for the policy. This would require also the implementation of #529
making the end_date field editable

Is this a breaking change

Similarly to #529, this could be implemented in a non breaking way.

• No, not breaking

Impacted Spec

For which spec is this feature being requested?

• policy

Describe alternatives you've considered

Keep current date process

[jean-populus]

Is this still a pressing issue we want to address or is it ok to close it for now?