I spent a little while messing around with git over the past couple of
days, and ended up updating the bash git repository on savannah
(http://git.savannah.gnu.org/cgit/bash.git to browse the sources).
Bash-4.2 patch 20 is the head of the tree, and there's a branch
containing the `direxpand' patches that I've posted here. Each
bash-4.2 patch is in there as a separate commit.
All the released sources back to bash-1.14.7 are there, building on
the work Jari Aalto started a couple of years ago.
Chet