WebDAV: SUBSCRIBE/UNSUBSCRIBE/POLL

[Best, Jan-Pascal van]

> Would it be possible for you to implement these extensions using the
> 'davHeader' or the 'customHTTPHeader' metadata properties?

No: they're new methods, not just new headers tags. I already 
use the customHTTPHeader for the Notification-type and
the Call-Back headers.

A complete subscribe request looks like this:

SUBSCRIBE /exchange/janb/Calendar HTTP/1.1
Connection: Keep-Alive
User-Agent: Mozilla/5.0 (compatible; Konqueror/3; Linux)
Pragma: no-cache
Cache-control: no-cache
Accept: text/*, image/jpeg, image/png, image/*, */*
Accept-Encoding: x-gzip, x-deflate, gzip, deflate, identity
Accept-Charset: iso-8859-1, utf-8;q=0.5, *;q=0.5
Accept-Language: en
Host: mail.tbm.tudelft.nl
Notification-type: update
Depth: 1
Call-Back: httpu://130.161.216.42:1936
Authorization: Basic XXXXXXXXXXXXXXXX

Jan-Pascal