Created Issue: Linux: "chunked" detection logic doesn't work in all cases [2]

in read_headers (http_client.cpp):

ctx->m_needChunked = boost::iequals(value, U("chunked"));

Above statement will not always work because some site somehow inserts an additional space before the "chunked"

test:

www.cnn.com, "chunked"
news.cnet.com, " chunked"

A dummy workaround (didn't know how to easily trim):

if(!ctx->m_needChunked)
ctx->m_needChunked = boost::iequals(value, U(" chunked"));

This fixes the issue for this particular case (not sure if similar issue exist for other type of detection).