Re: invalid command name "listrefs"

Junio,

Starting gitk, "File->Reread references" results in an error
dialog.

This patch resurrects the procedure from an older version, and it
seems to work for me, but with the updated code it might be that
you wanted to use a different mechanism to implement rereadrefs
procedure -- I dunno.

Thanks for pointing that out.  I had removed listrefs in the course of
doing some changes that I later dropped; not reinstating listrefs at
that point was just an oversight.

Paul.