[BUGFIX] Determine Chinese simplified Han "Accept-Language" header

Internet Explorer (IE11 & Edge) changed the submitted HTTP header
for "Accept-Language" from "zh-cn" to "zh-hans-cn". In order to
determine the Chinese language correctly, this value is added.

Releases: master, 8.7
Resolves: #81858
Change-Id: I477f88950313aa9bf0aeabbf6603bd15247a52ba
Reviewed-on: https://review.typo3.org/51056


Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>