return strategy proxy if no rule file specified.

README.md

@@ -1,4 +1,4 @@
-# glider
+# [glider](https://github.com/nadoo/glider)
 glider is a forward proxy with multiple protocols support.
 
 we can set up local listeners as proxy, and forward requests to internet via forwarders.

rules.go

@@ -15,6 +15,11 @@ type rulesForwarder struct {
 
 // newRulesForwarder .
 func newRulesForwarder(ruleForwarders []*ruleForwarder, globalForwarder Proxy) Proxy {
+
+	if len(ruleForwarders) == 0 {
+		return globalForwarder
+	}
+
 	p := &rulesForwarder{globalForwarder: globalForwarder}
 
 	for _, f := range ruleForwarders {