Embedded NATS Broker (#1110)

* if the address is produced by a default route don't hash it

* embedded nats

* fix url parsing

* don't override help

* add ready flag

broker/nats/options.go

@@ -7,12 +7,18 @@ import (
 
 type optionsKey struct{}
 type drainConnectionKey struct{}
+type localServerKey struct{}
 
 // Options accepts nats.Options
 func Options(opts nats.Options) broker.Option {
 	return setBrokerOption(optionsKey{}, opts)
 }
 
+// LocalServer embeds a local server rather than connecting to one
+func LocalServer() broker.Option {
+	return setBrokerOption(localServerKey{}, true)
+}
+
 // DrainConnection will drain subscription on close
 func DrainConnection() broker.Option {
 	return setBrokerOption(drainConnectionKey{}, struct{}{})