Can't handler chunked data from php

[GoogleCodeExporter]

What steps will reproduce the problem?
1. setup a fast-cgi php environment
2. write a php file: <? phpinfo();
3. use go-fastcgi-client to fetch the php output

What is the expected output? What do you see instead?
Expect: a complete output of phpinfo();
Instead: only first 8k chunk were output.

What version of the product are you using? On what operating system?
go 1.1

Please provide any additional information below.
It seems the read function only fetch first chunk of php output buffer.
The fcgiclient should start a pipeline instead of just read php output to a 
buffer. since php may output very large result data.

Original issue reported on code.google.com by tomasen on 15 Aug 2013 at 4:14