add 'debugrebuildstate' to rebuild the dirstate from a given revision - added and removed files will be lost while recreating the dirstate - modifications are not lost

adding foo
adding bomb
adding a.c
adding dir/a.o
adding dir/b.o
! a.c
! dir/a.o
! dir/b.o
? .hgignore
a.c: unsupported file type (type is fifo)
! a.c