support multi root namespace in router

[leapsea]

1. support multi root namespace in router
2. set summery default value

[leapsea]

?
thiss build-tool error ../../../honnef.co/go/tools/unused/unused.go:1319:15: field.Embedded undefined (type *types.Var has no field or method Embedded)
The command "go get -u honnef.co/go/tools/cmd/staticcheck" failed and exited with 2 during .
Your build has been stopped.`

[Shikkic]

I could be wrong but I think it's related to the version of Go that you're using for that CI build (go1.10.3). If you bumped it to latest or at least 1.11 I think it should work. dominkih/go-tools only supports the last two versions of Go.