When the user points her browser to an URL that
only has the tracker name behind the cg-bin, an error
message is produced that give the false impression that
the  roundup installation is buggy.

A more friendly page is needed here as users do shorten
urls 
quite regular.

eg instead of .../roundup.cgi/testroundup/index someone
points to
 .../roundup.cgi/testroundup

KeyError: REQUEST_URI Python 2.1.3

A problem occurred while running a Python script. Here
is the sequence of function calls leading up to the
error, with the most recent (innermost) call first. The
exception attributes are:
      args = ('REQUEST_URI',)

/usr/lib/python2.1/UserDict.py in
__getitem__(self={'SCRIPT_NAME':
'/roundup/roundup.cgi', 'HTTP_AC...ED_FOR':
'212.95.126.10', 'REMOTE_PORT': '60037'},
key='REQUEST_URI')
   12             return cmp(self.data, dict)
   13     def __len__(self): return len(self.data)
   14     def __getitem__(self, key): return self.data[key]