HTTP Client: modified spec and first implementation

  Dear EXSLT-ers,

  Eventually, I have just updated a new version of the spec for
the HTTP Client extension.  Unfortunately, there is no diff
version, but the older version is still available, and here is a
summary of the changes:

    * added additional prototypes (from 1 to 3 params)

    * added @follow-redirect on http:request

    * added @href on http:body

    * defined XML, HTML, Text and Binary media types

  The document is available at:

http://www.fgeorges.org/xslt/exslt2/http-client.html

  The issue was raised about the use case for the attribute
@send-authorization.  I got this one from XProc, and ask them
for its raison d'=EAtre.  2 points, as I thought: avoiding the
"got a 401, retry with credentials" round trip and a security
issue as credentials are not encoded in Basic authentication, so
we really want the user to explicitly ask for sending
authentication directly.

  I also have an implementation for Saxon using Apache HTTP
Client 4.0.  You can find it at:

http://www.fgeorges.org/xslt/exslt2/exslt2-http-client-0.1.tar.gz

  This archive contains all dependencies (except Saxon itself)
and a simple example.  Please follow the README file to run it
properly on your platform.

  Any comment more than welcome!  And thanks for the feedback
got so far.

  Kind regards,

-- =

Florent Georges
http://www.fgeorges.org/