Incorrect redirects for old setup and loop pages

[per1234]

https://www.arduino.cc/en/Reference/Setup
redirects to:
https://www.arduino.cc/reference/en/language/functions/main/setup/
but the correct URL is:
https://www.arduino.cc/reference/en/language/structure/sketch/setup/

---

https://www.arduino.cc/en/Reference/Loop
redirects to:
https://www.arduino.cc/reference/en/language/functions/main/loop/
but the correct URL is:
https://www.arduino.cc/reference/en/language/structure/sketch/loop/

---

This is not necessarily a comprehensive list. It's just the two instances I stumbled across on the "See also" section of this page:
https://www.arduino.cc/en/Tutorial/Sketch

There are previous issues related to redirects from the old reference URLs, but those have a difference cause than this one:

• Old reference links with / as last char do not redirect #236
• Outdated version of the Language Reference homepage still available online #474
• Many old reference pages still don't redirect #481

[endorama]

updated redirects to setup and loop.

pinMode was also wrong, fixed.

(expect cache to last few hours)

[endorama]

Redirects are working, closing.