HEAD method in HttpResponseDecoder

[robert.ambrose at muttsoft.com]

It looks like HttpResponseDecoder is trying to read a message body of the 
response to a HEAD request.  According to rfc 2616 sections 4.3 and 9.4, 
this response should never have a message body.  The problem is there's 
still a Content-Length header present in the response so 
HttpResponseDecoder waits forever for the the message body.  Somehow the 
response needs to know that the method of the request was a HEAD.

rna