… instead

When we are on a protected endpoint, we redirect to the same page after we paused a plugin.

This has two effects:

* The protected endpoints are always immediately available, they don't show the error message on first encounter.
* The flow is exactly the same, whether only one plugin or multiple plugins are broken. So, if you update PHP and ten plugins break at once, you still get into the admin backend with one click, and the ten plugins will be paused already.

…e `.php` extension

Reported by @bradleyt in https://core.trac.wordpress.org/ticket/44458#comment:29

Reported by @bradleyt in https://core.trac.wordpress.org/ticket/44458#comment:29

…rror().

… drop-in and clarify its usage.

… overriding via a drop-in.

This reverts commit 3061589.

… with the PHP unset keyword

…separate ticket

…urprises

…k vector

…an attack vector"

This reverts commit 5d38162 as it
requires another discussion.

…t some docs.

… existing labels in admin.