Add an option to automatically close an issue when the MR is merged into a protected branch
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- [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=221036)
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### Problem to solve
We develop using more than one release branch. When we merge into the `master` branch, using the [Closing issues automatically](https://gitlab.comelz.com/help/user/project/issues/managing_issues.html#closing-issues-automatically) feature, the issue is automatically closed.
But when we merge into a different branch (usually a protected branch for each supported release) the issue is not closed.
### Intended users
Both developers, TL or PM, adds a burden to manually update some issue is some case and not others.
### User experience goal
Offer a coherent behavior for users using more than one release branch.
### Proposal
Add an option to close any issue merged into a **protected branch**, not only the default one.
### Documentation
Update this page: https://gitlab.comelz.com/help/user/project/issues/managing_issues.html#closing-issues-automatically
issue