minor symfony#14541 Use HTTPS in README and some other fixes (WouterJ)

This PR was merged into the 2.3 branch.

Discussion
----------

Use HTTPS in README and some other fixes

| Q             | A
| ------------- | ---
| Fixed tickets | -
| License       | MIT

Commits
-------

89a1903 Use HTTPS in README and some other fixes

Author: Tobion

README.md

@@ -34,34 +34,33 @@ Installation
 ------------
 
 The best way to install Symfony is to download the Symfony Standard Edition
-available at [http://symfony.com/download][1].
+available at <https://symfony.com/download>.
 
 Documentation
 -------------
 
-The "[Quick Tour][2]" tutorial gives you a first feeling of the framework. If,
+The "[Quick Tour][1]" tutorial gives you a first feeling of the framework. If,
 like us, you think that Symfony can help speed up your development and take
 the quality of your work to the next level, read the official
-[Symfony documentation][3].
+[Symfony documentation][2].
 
 Contributing
 ------------
 
 Symfony is an open source, community-driven project. If you'd like to contribute,
-please read the [Contributing Code][4] part of the documentation. If you're submitting
-a pull request, please follow the guidelines in the [Submitting a Patch][5] section
-and use [Pull Request Template][6].
+please read the [Contributing Code][3] part of the documentation. If you're submitting
+a pull request, please follow the guidelines in the [Submitting a Patch][4] section
+and use [Pull Request Template][5].
 
 Running Symfony Tests
 ----------------------
 
 Information on how to run the Symfony test suite can be found in the
-[Running Symfony Tests][7] section.
-
-[1]: http://symfony.com/download
-[2]: http://symfony.com/get_started
-[3]: http://symfony.com/doc/current/
-[4]: http://symfony.com/doc/current/contributing/code/index.html
-[5]: http://symfony.com/doc/current/contributing/code/patches.html#check-list
-[6]: http://symfony.com/doc/current/contributing/code/patches.html#make-a-pull-request
-[7]: http://symfony.com/doc/master/contributing/code/tests.html
+[Running Symfony Tests][6] section.
+
+[1]: https://symfony.com/get_started
+[2]: https://symfony.com/doc/current/
+[3]: https://symfony.com/doc/current/contributing/code/index.html
+[4]: https://symfony.com/doc/current/contributing/code/patches.html#check-list
+[5]: https://symfony.com/doc/current/contributing/code/patches.html#make-a-pull-request
+[6]: https://symfony.com/doc/master/contributing/code/tests.html