• urlencode format parsing #6

### hello post
POST https://httpbin.org/post
Content-Type: application/x-www-form-urlencoded
                
foo1=bar
&foo2=bar
&foo3=bar

• Add 'X-msg-header' custom message headers for PUB method

### send pulsar message
PUB test-topic
Host: pulsar://localhost:6650
Content-Type: application/json
X-Custom-Header: header_value

{
  "name": "Jackie"
}