Description

In case the user requested an immediate exit, he ensure he is not in a subshell

This PR makes the decision obsolete, if the function is called from a subshell or not.

Inspired from: https://cravencode.com/post/essentials/exit-shell-script-from-subshell/

History:

• scripts: improve panic helpers #3155
• [BUG] _shutdown will continue when called in a subshell (causing UB) #3140
• [BUG] Cannot find a valid DOMAIN for '/etc/letsencrypt/live/<DOMAIN>/', tried: '', 'subdomain.domain.tld', 'domain.tld' #3133

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (non-breaking change that does improve existing functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md or the documentation under docs/)
• If necessary I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes