Symfony version(s) affected: 4.3

Description
URL parsing fails. For example:
https://nova.laravel.com/password/reset
This resolves correctly.
However https://nova.laravel.com//password/reset this results in a 404. Which could be seen as a user error.
But https://nova.laravel.com//foobar/password/reset also resolves, however incorrectly. Clearly signaling it as a bug.

How to reproduce
Go to https://nova.laravel.com//foobar/password/reset. Or in any Laravel/Symfony project add an extra / after the host.

Possible Solution
I added a possible solution in this PR.
#29631