reproducible Debian: move etc/munin/munin-node.conf.d to hosts/common (except armhf nodes which report wrong hostnames)

Signed-off-by: Holger Levsen <holger@layer-acht.org>

reproducible Debian: move etc/squid/squid.conf to hosts/common-(amd64|i386|arm64) as armhf uses a central proxy

Signed-off-by: Holger Levsen <holger@layer-acht.org>