Committed patch in HTTP module for supporting callbacks to write data repeatedly

This is a small patch which allows a data feeding callback (for example
used to PUT or POST) to be called multiple times. Before it was only called
once but now it is called as long as it returns HT_OK. It stops being
called when the callback returns something else than HT_OK.

	http://dev.w3.org/cgi-bin/cvsweb/libwww/Library/src/HTTP.c#rev1.181

linked from

	http://dev.w3.org/cgi-bin/cvsweb/libwww/Library/src/

Get the latest updates as described in

	http://www.w3.org/Library/cvs.html#update

Recompile as described in

	http://www.w3.org/Library/cvs.html#Boot

Please try it out!

Henrik
--
Henrik Frystyk Nielsen,
World Wide Web Consortium
http://www.w3.org/People/Frystyk