RFE: Add Subversion keyword for year

I'm currently in the process of updating copyright notices where I work. To
me, this is an ideal place for a SVN keyword:

Copyright 2008-$Year$ MyCompany

The SVN keywords listed in the online documentation list Date, but it's far
too specific for a copyright. As an alternate, perhaps a special formatting
keyword for dates could be established: $Date(YYYY)$, for example.

Alex Vincent
San Leandro, CA

-- 
"The first step in confirming there is a bug in someone else's work is
confirming there are no bugs in your own."
-- Alexander J. Vincent, June 30, 2001