response.scm does not seem to handle the case where the server does not
specify a content length.  Here's a minimal example that should work,
but doesn't:

--8<---------------cut here---------------start------------->8---
#!/usr/local/bin/guile -s
!#

(use-modules (srfi srfi-8)
             ((web uri)    #:select (string->uri))
             ((web client) #:select (http-get)))

(receive (res-headers res-body)
    (http-get (string->uri "http://www.blogger.com/feeds/4777343509834060826/posts/default"))
  (display res-body)
  (newline))
--8<---------------cut here---------------end--------------->8---

Now the reason that I started experimenting with guile in the first
place was that I wanted to learn more about scheme, and fixing this
seemed like a good opportunity at a practical application of my basic
scheme skills.

So I did a little debugging and created this little patch that fixes
this issue.