URL-specification `default'

I just wanted to change the setting for purging from -1 to an age of
2m.

From <http://localhost:8080/configuration/Purge/compress-age> I
followed the link to the description of the URL-Specification,
<http://localhost:8080/configuration/#URL-SPECIFICATION>, where I
found this example:

,----
|    *://*/*
|           Any protocol, Any host, Any port, Any path, Any args (This
|           is that same as saying 'default').
`----

Apart from the wording (should be "THE same", I suppose), when I
entered "default" for the URL and requested the change to be
performed, I got a page complaining that the change failed as a URL
specification had been expected but "default" received.  (It worked
with "*://*/*".)

User bug?  Documentation bug?  Or should wwwoffle be changed to allow
that syntax?  This is with version 2.9a.

Best regards,

Albert.