bundle: push chunkbuffer down into decompress
We replace the fixup iterator with a file-like object so that
uncompressed file streams can be passed end to end through the stack.
#!/bin/sh
"$TESTDIR/hghave" inotify || exit 80
hg init
echo "[extensions]" > .hg/hgrc
echo "inotify=" >> .hg/hgrc
hg inserve -d --pid-file .hg/inotify.pid
echo a > a
hg ci -Aqm0
hg co -q null
hg co -q
hg st
cat a
kill `cat .hg/inotify.pid`