Further consolidate the libraries

api/resolver/host/host.go

@@ -0,0 +1,27 @@
+// Package host resolves using http host
+package host
+
+import (
+	"net/http"
+
+	"github.com/micro/go-micro/api/resolver"
+)
+
+type Resolver struct{}
+
+func (r *Resolver) Resolve(req *http.Request) (*resolver.Endpoint, error) {
+	return &resolver.Endpoint{
+		Name:   req.Host,
+		Host:   req.Host,
+		Method: req.Method,
+		Path:   req.URL.Path,
+	}, nil
+}
+
+func (r *Resolver) String() string {
+	return "host"
+}
+
+func NewResolver(opts ...resolver.Option) resolver.Resolver {
+	return &Resolver{}
+}