* ''Revision Log'' link from the browser page will use the specified
revision, if there is one. This should fix #2239.
* ''View Latest Revision'' link from the revision log page will ''not''
use the specified ''start'' revision, but instead will go to the
youngest revision. That's more intuitive and anyway it's still possible
to browse the ''start'' revision by following the browse rev link found
in the first row.
