use /boot/config based on debian version #48

Job	Run time
bookworm armv7 / build	4m 7s
bullseye armv7 / build	3m 38s
bullseye armv7 / test (run_install_common.sh)	15m 3s
bullseye armv7 / test (run_install_faststartup.sh)	10m 2s
bullseye armv7 / test (run_install_webapp_local.sh)	15m 58s
bullseye armv7 / test (run_install_webapp_download.sh)	14m 7s
bullseye armv7 / test (run_install_libzmq_local.sh)	24m 6s
bookworm armv7 / test (run_install_common.sh)	14m 45s
bookworm armv7 / test (run_install_faststartup.sh)	9m 53s
bookworm armv7 / test (run_install_webapp_local.sh)	14m 48s
bookworm armv7 / test (run_install_webapp_download.sh)	14m 26s
bookworm armv7 / test (run_install_libzmq_local.sh)	25m 25s
bullseye armv7 / cleanup	2s
bookworm armv7 / cleanup	3s
	2h 46m 23s

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