Redirect loop if install.php is not present in a multisite install

Problem/Motivation

It was recommended with SA-CORE-2012-003 → that the install.php could be deleted.
see Notes section on https://heine.familiedeelstra.com/drupal-7-installer-vulnerability

From the codebase it seems the bug is still present in Drupal 7.
https://git.drupalcode.org/project/drupal/-/blob/7.x/includes/bootstrap....

And it seems D9 is also redirecting without checking if the file exists.
https://git.drupalcode.org/project/drupal/-/blob/9.4.x/core/lib/Drupal/C...

Original Report

I've read everything starting from http://groups.drupal.org/node/121064 ( How to documentation for creating Drupal 7 multisite configuration ) about multi-site installation and I have two Drupal 6 installations working perfectly with multi-site but for the life of me I can't get a working version using Drupal 7.
The installation steps I followed were basically the same as for Drupal 6.
Whenever I attempt to navigate to a parked domain the browser eventually displays "This web page has a redirect loop" Error 310 (net:: ERR_TOO_MANY_REDIRECTS) There were too many redirects.
Please could someone tell me what I need to do to fix it?

Do I need to do some work with symlinks? They weren't needed in my Drupal 6 installations.

Steps to reproduce

For Drupal 7
1. Installed Drupal via Installatron
2. Configure a multisite install
3. Run Setup to create the multisite install

Proposed resolution

Delete core/install.php

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet