bdiff.c: rename all variables which hold a hash value to "hash"
basic test for hg debugrebuildstate $ hg init repo $ cd repo $ touch foo bar $ hg ci -Am 'add foo bar' adding bar adding foo $ touch baz $ hg add baz $ hg rm bar $ hg debugrebuildstatestate dump after $ hg debugstate --nodates | sort n 666 -1 bar n 666 -1 foostatus $ hg st -A ! bar ? baz C foo