From: Stephan Koops <Stephan.Koops_at_web.de>
Date: Wed, 14 May 2008 09:29:12 +0200

Hi Marc,

the javadoc for UriBuilder.extension(String) says, that
> a null value will unset an existing extension including a trailing
"." if necessary
Does this mean all extensions or one ? (e.g. if the original uri was
.../index.en.html")

best regards
   Stephan