Largely replace the Debian packaging with a new and much more up-to-date

Debhelper based version.

debian/systemd-helper

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+. /usr/share/dnsmasq/init-system-common
+
+case "$1" in
+	checkconfig)
+		checkconfig
+		;;
+	start-resolvconf)
+		start_resolvconf
+		;;
+	stop-resolvconf)
+		stop_resolvconf
+		;;
+	exec)
+		# /run may be volatile, so we need to ensure that
+		# /run/dnsmasq exists here as well as in postinst
+		if [ ! -d /run/dnsmasq ]; then
+			mkdir /run/dnsmasq || { [ -d /run/dnsmasq ] || exit 2 ; }
+			chown dnsmasq:nogroup /run/dnsmasq || exit 2
+		fi
+		exec ${DAEMON} -x /run/dnsmasq/${NAME}${INSTANCE:+.${INSTANCE}}.pid \
+			${MAILHOSTNAME:+ -m ${MAILHOSTNAME}} \
+			${MAILTARGET:+ -t ${MAILTARGET}} \
+			${DNSMASQ_USER:+ -u ${DNSMASQ_USER}} \
+			${DNSMASQ_INTERFACES:+ ${DNSMASQ_INTERFACES}} \
+			${DHCP_LEASE:+ -l ${DHCP_LEASE}} \
+			${DOMAIN_SUFFIX:+ -s ${DOMAIN_SUFFIX}} \
+			${RESOLV_CONF:+ -r ${RESOLV_CONF}} \
+			${CACHESIZE:+ -c ${CACHESIZE}} \
+			${CONFIG_DIR:+ -7 ${CONFIG_DIR}} \
+			${DNSMASQ_OPTS:+ ${DNSMASQ_OPTS}}
+		;;
+esac