Pprof listen (#639)

* add listen addr option

* Add listen address option to pprof

* There is configuration

* code styling

middleware/pprof/setup_test.go

@@ -12,6 +12,8 @@ func TestPProf(t *testing.T) {
 		shouldErr bool
 	}{
 		{`pprof`, false},
+		{`pprof 1.2.3.4:1234`, false},
+		{`pprof :1234`, false},
 		{`pprof {}`, true},
 		{`pprof /foo`, true},
 		{`pprof {