request body with 'chunked' transfer-encoding being re-encoded when forwarded

[james-valente-simplisafe]

When gor captures an incoming request which uses a transfer-encoding of 'chunked', it re-encodes the chunked body when forwarding it. In the example below, the original incoming chunked body (of 56 characters in length) is being re-encoded as a chunked body (of 61 characters in length).

---

# ./gor --verbose --input-raw ':80'  --output-http localhost:9999

Version: 0.9.2

2015/02/05 20:52:27 Sending RAW Socket input: :80 :  POST /xxxxxx/sessions/findOne HTTP/1.1
Authorization: Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=
Content-Type: application/bson
Host: foo.example.com
Connection: keep-alive
Transfer-Encoding: chunked

56
Vquery<token,XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXoptions
0

---

# nc -k -l 9999

POST /xxxxxx/sessions/findOne HTTP/1.1
Host: foo.example.com
User-Agent: Go 1.1 package http
Transfer-Encoding: chunked
Authorization: Basic XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=
Connection: keep-alive
Content-Type: application/bson
Accept-Encoding: gzip

61
56
Vquery<token,XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXoptions
0


0

[MartinNowak]

We need to omit this block for chunked-encoding POSTs.
https://github.com/buger/gor/blob/92ba32156935c97d4614baa1255b6750f07c9cf1/output_http.go#L41

[MartinNowak]

Introduced by #133.

[buger]

Should be fixed in 0.9.4 version