Further improvements, most of them as proposed by Michael Schams

Releases: main
Resolves: #100755
Related: #100747
Related: #100740
Change-Id: I4111a8e1025eb7c2e5e5c3273e320505c153e4ec
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78875


Reviewed-by: Michael Schams <typo3.mschams@2023.schams.net>
Tested-by: Torben Hansen <derhansen@gmail.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Michael Schams <typo3.mschams@2023.schams.net>
Tested-by: Jörg Bösche <typo3@joergboesche.de>
Reviewed-by: Jörg Bösche <typo3@joergboesche.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Thomas Hohn <tho@gyldendal.dk>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Torben Hansen <derhansen@gmail.com>
Reviewed-by: Thomas Hohn <tho@gyldendal.dk>

Releases: main
Resolves: #100747
Change-Id: Ifd39f0813996674620fe1b89aef29ca87351e5b9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78839


Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>

* TYPO3 v12.4.x LTS is supported
* TYPO3 v11.5.x LTS is supported
* previous sprint releases of TYPO3 v12 are not covered
* anything else prior to TYPO3 v11.5.0 is not covered

Resolves: #100740
Releases: main
Change-Id: I577569cd9794cafb2efb74bb92ef2b5d21c0a846
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78835


Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Oliver Hader <oliver.hader@typo3.org>

Supported versions by the community has been changed
after v11 LTS has been released, Furthermore v9 has
shifted into ELTS and is no longer supported by the
community.

This patch updates the version matrix in SECURITY.md
to reflect these changes, as this is for ex. displayed
on github as security policy.

Resolves: #95604
Releases: master
Change-Id: Ie12b1d1dd52fbca7b443bb17b0033379175866ac
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71595


Tested-by: Simon Gilli <typo3@gilbertsoft.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Simon Gilli <typo3@gilbertsoft.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

Resolves: #92037
Releases: master, 10.4, 9.5
Change-Id: I1278496485ead10a46f82c1d681db1e48a0aac1d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65360


Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>