Fixes #587
Option are not good in term of accessibility, so use checkbox instead.
Fix test using Cypress 6

Bumps [django](https://github.com/django/django) from 3.0.7 to 3.1.6.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/3.0.7...3.1.6)

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Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.19.2...v0.21.1)

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Bumps [axios](https://github.com/axios/axios) from 0.19.2 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.19.2...v0.21.1)

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Bumps [axios](https://github.com/axios/axios) from 0.21.0 to 0.21.1.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v0.21.1/CHANGELOG.md)
- [Commits](https://github.com/axios/axios/compare/v0.21.0...v0.21.1)

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closes #580

The header must contain the `includeSubDomains` directive.
The header must contain the `preload` directive.

Until the day TLS 1.3 becomes widely supported, web servers must rely on a fallback to TLS 1.2 with correctly configured server directives and strong cipher suites.

 * https://www.cloudinsidr.com/content/tls-1-3-and-tls-1-2-cipher-suites-demystified-how-to-pick-your-ciphers-wisely/
 * (fr) https://www.ssi.gouv.fr/guide/recommandations-de-securite-relatives-a-tls/
 * https://ssl-config.mozilla.org/#server=apache&version=2.4.41&config=intermediate&openssl=1.1.1d&guideline=5.6

Current httpd*.conf files are copied from httpd:2.4 Docker official
images which has trailing spaces, but not added by the project, should
be ignored.

It's suggested to minimized the unnecessary information disclosure as
part of the nginx hardening practice.

This will speed up the website loading, and make the website more
reliable to the users when the client fails to connect to the CA for an
OCSP response.

Reference:
- https://en.wikipedia.org/wiki/OCSP_stapling

Modules tty and termios will not be used in Windows

Fix lesspass/lesspass#556

* Rename README.md

README.md wasn't actually a readme but an example for how
to make a simple pki.

* Updating ssl script

+ Adding shebang line (#!/usr/bin/env bash)
+ Adding variables for key type and subject
+ Adding comments
+ Adding openssl verify

Use shutil.which instead of subprocess.call()