preconfirm_subscriptions only implemented for POST, not PUT

[totycro]

Version:

• listmonk: 1.1.0
• OS: Docker

Description of the bug and steps to reproduce:
When adding a list to a subscriber via the PUT endpoint with preconfirm_subscriptions, the list subscriptions won't be confirmed and also a confirmation email is sent.

Checking for preconfirmation is currently only implemented for the POST endpoint, i.e. here:
https://github.com/knadh/listmonk/blob/master/cmd/subscribers.go#L682

Probably, there should be something like if !req.PreconfirmSubs { before this line, as well as setting the confirmation status for these subscriptions:
https://github.com/knadh/listmonk/blob/master/cmd/subscribers.go#L348

Steps to reproduce
For a user having e.g. no list subscriptions, this call will create unconfirmed subscriptions and send out emails:

curl -v https://mylistmonk/api/subscribers/82 -X PUT -H "Content-Type: application/json" -d '{"email": "[email protected]", "name": "foo", "status": "enabled", "lists": [2], "preconfirm_subscriptions": true}'

This call however will create confirmed subscriptions and not send emails:

curl -v https://mylistmonk/api/subscribers -X POST -H "Content-Type: application/json" -d '{"email": "[email protected]", "name": "foo "status": "enabled", "lists": [2], "preconfirm_subscriptions": true}'

[knadh]

Thanks for reporting this. Fixed on the develop branch: e656618