arnold does not reset autoenable date on manual detentions

[John-Magne Bredal]

The value for autoenable persists after a port has been detained and opened. This means that if a user detains a previously detained port with a value for autoenable without setting a new value for autoenable, it will be reopened on the next run of the autoenable script.

The fact that this port is previously detained or that it has a value for autoenable, is not visible for the user.

The solution here is to remove any value for autoenable when a detention is lifted.

[John-Magne Bredal (john-m-bredal)]

Fix here
https://nav.uninett.no/hg/stable/rev/eec26e771f51