Preliminary discussion: DB alias entries

[Greg Hudson]

On Wed, 2009-03-04 at 17:47 -0800, Love Hörnquist Åstrand wrote:
> Put alias key in namespace that normal key not is in, no collisions  
> then with old codebase. make alias data an indirection to real entry

I thought about that, but that adds an extra lookup in some cases.
(Either two lookups all the time, or three lookups for an aliased name,
depending on the implementation.)

It is in some ways more elegant, though.  I'll think on it more
carefully.