Makefile: add `go get` to install external plugins
Fixes
@@ -20,10 +20,12 @@ check: core/plugin/zplugin.go core/dnsserver/zdirectives.go
core/plugin/zplugin.go core/dnsserver/zdirectives.go: plugin.cfg
go generate coredns.go
+ go get
.PHONY: gen
gen:
go generate coredns.go
+ go get
.PHONY: pb
pb:
