add Makefile to generate customized dnsmasq conf and unbound conf

Makefile

+SERVER=114.114.114.114
+
+raw:
+	sed -e 's|^server=/\(.*\)/114.114.114.114$$|\1|' accelerated-domains.china.conf > accelerated-domains.china.raw.txt
+
+dnsmasq: raw
+	sed -e 's|\(.*\)|server=/\1/$(SERVER)|' accelerated-domains.china.raw.txt > accelerated-domains.china.dnsmasq.conf
+
+unbound: raw
+	sed -e 's|\(.*\)|forward-zone:\n  name: "\1."\n  forward-addr: $(SERVER)\n|' accelerated-domains.china.raw.txt > accelerated-domains.china.unbound.conf
+
+clean:
+	rm -f accelerated-domains.china.{dnsmasq,unbound}.conf accelerated-domains.china.raw.txt