add RaspberryPi3 to release template and fix release workflow SHA

checksum check.

update upstream kernel to 6.6.63

add x264 and x265 support to ffmpeg to ensure cameras stream can be

properly transcoded into h264/h265 (e.g. within xfreerdp). Also disabled
the wayland freeprdp client sind it is not required for our application.

update upstream kernel to 6.6.52

update upstream kernel to 6.6.43

bump to final qutselect 3.0 and add hash

cleanup afterwards.

updated .gitignore

instead of using the "sync" option when mounting USB data drives - which

slows down transfer speed considerably and also increases the wear level
load - we ensure a good synced media via decreased
vm.dirty_expire_centisecs and vm.dirty_writeback_centisecs to 5 seconds.
Thus we use a global sysctl.conf now with reasonable values.

added missing CROCUS gallium driver and include the mesa3d demos for the

time being so that we will have glxinfo and glxgears tool.