This should fix CSRF crashes with recovery

issue #5854

issue #5854

Resolve "Security: Missing Security Headers"

See merge request fusiondirectory/fd!303

(cherry picked from commit 7d9a58d9)

4a182d01  feat(core) Add header to forbid framing

For PHP<7.0, we fall back on openssl_random_pseudo_bytes from openssl module.

issue #5843

issue #5831

This also fix the workflow to make sure the language in the header is
 correct in all cases.
A PHP error is triggered if setlocale fails or if the wrong language
 header was sent.

issue #5820

There are some left in datepicker.js because of a bug in the sniffer,
 I did not find a way to fix that yet.

issue #5690

- Add copyright
- Remove odd looking icon and version
- Add a way to navigate back from password recovery
- Add icons to password recovery fields

Conflicts:
	html/class_passwordRecovery.inc

Used in webservice

Used in webservice

Conflicts:
	html/class_passwordRecovery.inc

Signed-off-by: Benoit Mortier <benoit.mortier@opensides.be>