pi 5 support (#2640)

* prioritize raspi repo

* change kernel

* use newer kernel

* Update build.sh

* fix ssh keygen

* switch to .com

* use raspi-update to download firmware

* Update build.sh

* Update build.sh

* Update build.sh

* Update build.sh

* switch to boot/firmware

* fix fstab

* update-initramfs

* skip check partition

* switch back to boot

* fix initramfs

* use rpi-update kernels

* simplify kernel selection

debian/postinst

@@ -80,6 +80,7 @@ sed -i '/\(^\|#\)ForwardToSyslog=/c\ForwardToSyslog=no' /etc/systemd/journald.co
 sed -i '/^\s*#\?\s*issue_discards\s*=\s*/c\issue_discards = 1' /etc/lvm/lvm.conf
 sed -i '/\(^\|#\)\s*unqualified-search-registries\s*=\s*/c\unqualified-search-registries = ["docker.io"]' /etc/containers/registries.conf
 sed -i 's/\(#\|\^\)\s*\([^=]\+\)=\(suspend\|hibernate\)\s*$/\2=ignore/g' /etc/systemd/logind.conf
+sed -i '/\(^\|#\)MulticastDNS=/c\MulticastDNS=no' /etc/systemd/resolved.conf
 
 mkdir -p /etc/nginx/ssl