XWiki configuration change

[Vincent Massol]

Hi,

For those using a custom XWiki configuration with a custom web.xml,  
we have changed yesterday the way to configure xwiki. Namely we have  
changed the way XWiki is initialized.

So if you're using a custom web.xml and you wish to upgrade to the  
trunk version (or to 1.0 beta 5 when it's out) you'll need to read  
the following:
http://www.xwiki.org/xwiki/bin/view/Main/ 
ReleaseNotesXWiki10Beta5#HMigrationnotesfromallpreviousversions

Thanks
-Vincent