There are many fixes in between those versions, including security ones:

https://salsa.debian.org/kernel-team/linux/-/raw/stretch/debian/changelog

those 2 modules can make a system crash at startup. It is true for
Supermicro motherboards and winterfell motherboards.

See https://www.thomas-krenn.com/en/wiki/Resolve_mei:_Init_hw_failure_or_mei:_initialization_failed

This reverts commit 280c9763.

In commit 433f3d22, we disable the test
runners so the instances went back to previous organisation and so the
ports.

See merge request nexedi/slapos.package!128

The 1.0.163 version has instantiation fixed.

It's not needed in this context.

See merge request nexedi/slapos.package!127

See merge request nexedi/slapos.package!126

Also add important note why the SR shall be kept as is.

See merge request nexedi/slapos.package!125

python-requests package doesn't exist anymore on Ubuntu 20.04 so we
convert the upload script to support both python2 and python3 and we use
python3 in Debian >= 10 and Ubuntu >= 20.04.

This let us clean up the imt-vm-bootstrap playbook for Debian 10 (remove
manual installation of python-requests package).

See also nexedi/slapos!720

mroonga should be use by default as full text engine instead of myisam.

See merge request !122

/etc/rc.local doesn't exist anymore in Debian 10

Partially revert "playbook: make sure gpg package is installed before adding and removing package keys"

Changes to upload-to-cache were done by mistake

It has backported fix for name clash in etc/services, which were result with
apache not being able to restart.

See merge request !121

It has backported fix for name clash in etc/services, which were result with
apache not being able to restart.

In a test environment build time can vary significantly based on load of machine. Prevent false failures.

full software compilation from scratch the time to build site is a bit
more than 10h (in crowded testnode infrastructure!). This test was passing ONLY in
cases when shacache download of SR was used but now shacache is
intentionally NOT used thus increase accordingly.