[Bug web/64549] Add a 404 page

[gerald at pfeifer dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64549

Gerald Pfeifer <gerald at pfeifer dot com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |WAITING
                 CC|                            |gerald at pfeifer dot com