continue the login. For calendar data retrieval, the specified protocol
(<code>HTTP</code>, <code>HTTPS</code>) of the URL is used.
If you want to use a different <code>calid</code> (i.e. ''user[:calendar]''), e.g. if you want to work on
another calendar than your default one, then you currently have to
specify this in the URL, e.g.
<pre>
http://john%3apublic-cal@cal-server/
</pre>
<code>%3a</code> encodes the colon of the calid <code>john:public-cal</code>.
Of course, this ought to be specified by a convenient UI in the future. If you don't specify the '':calendar'' part, the user's default calendar is taken.
===UI===
