Unable to override NSUPDATE_SERVER

[scifibob]

acme.sh stores the NSUPDATE_SERVER variable in account.conf, and I'm unable to override it.
I don't know how, but I have 4 diffent local dns servers, and the script always manage to choose the one that is unable to do dynamic updates, and store it in the accont file.
I would think that overriding the variable "NSUPDATE_SERVER" would do it, but it does not work.
I have tried to uninstall acme.sh an installed it again, but then it selects the wrong server even before I start.

[scifibob]

I have tried manually to update account.conf, but it seems that the main script updates it somehow, and with the wrong ip.

[scifibob]

Even write protecting account.conf didn't work. Obviously, the script are doing some weird things.

[Neilpang]

the NSUPDATE_SERVER value can be overwritten now.
everytime you use export NSUPDATE_SERVER=xxxxxxxxx , it will save in the account.conf.

So, only the last NSUPDATE_SERVER is saved, thus, only the last sever's cert can be renewed automatically.

We planned to support multiple servers in future. see this bug: #2055