Auto merge of #22198 - Darkspirit:mpl_https, r=jdm

Update MPL license to https

Current MPL license (https://www.mozilla.org/en-US/MPL/2.0/) contains an https link:

> This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.

This change would not remove the summary above the LICENSE file. Tested [here](https://github.com/Darkspirit/darkspirit.github.io/blob/master/LICENSE).

I didn't update the `tests` folder with this change because I haven't yet looked into what needs to be considered with regards to WPT. Let's do that with a separate PR.

This change is splitted into multiple parts to prevent any "Load diff" button instead of a preview and was made with following commands:
```
git checkout -b mpl_https
kate python/tidy/servo_tidy/tidy.py
kate python/tidy/servo_tidy/licenseck.py
git add *
git commit -m "servo-tidy: Allow to use MPL with http and https"

find etc LICENSE mach ports python support -type f -not -path "python/tidy/servo_tidy/licenseck.py" -print0 | xargs -0 sed -i 's,http://mozilla.org/MPL/2.0/,https://mozilla.org/MPL/2.0/,g'
git add *
git commit -m "Update MPL license to https (part 1)"

find components/script/dom/webidls -type f -print0 | xargs -0 sed -i 's,http://mozilla.org/MPL/2.0/,https://mozilla.org/MPL/2.0/,g'
git add *
git commit -m "Update MPL license to https (part 2)"

find components/script -type f -print0 | xargs -0 sed -i 's,http://mozilla.org/MPL/2.0/,https://mozilla.org/MPL/2.0/,g'
git add *
git commit -m "Update MPL license to https (part 3)"

find components -type f -print0 | xargs -0 sed -i 's,http://mozilla.org/MPL/2.0/,https://mozilla.org/MPL/2.0/,g'
git add *
git commit -m "Update MPL license to https (part 4)"
./mach test-tidy --all
git push origin HEAD
```

---
- [x] `./mach test-tidy` does not report any errors

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/22198)
<!-- Reviewable:end -->

1 files changed, 1 insertions, 1 deletions

diff --git a/components/script/fetch.rs b/components/script/fetch.rs
index 01bc19945a8..49e441740bc 100644
--- a/components/script/fetch.rs
+++ b/components/script/fetch.rs
@@ -1,6 +1,6 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use crate::dom::bindings::codegen::Bindings::RequestBinding::RequestInfo;
 use crate::dom::bindings::codegen::Bindings::RequestBinding::RequestInit;