Sequencer migration patches

Hi,

the following patches migrate git-am and git-rebase--interactive to git-sequencer.

But there are some issues I want to mention.

I've compared performance of original rebase and am with the sequencer-based ones and the sequencer-based ones perform fairly bad. For example, applying 45 patches with git-am took 3 seconds using the original and 8 seconds using the sequencer-based one. Rebasing 100 commits takes 10.1 seconds instead of only 4.8 seconds on my test machine.

I expect that the builtin-sequencer performs muuuch better. But as long as there is no builtin-sequencer these patches should perhaps not be applied. Well, I could offer to provide patches to put sequencer-based git-am and git-rebase-i scripts to contrib/examples/ (or contrib/sequencer-examples/ or something else). ;-)

Regards,
  Stephan

Stephan Beyer (2):
  Migrate git-am to use git-sequencer
  Introduce git am --abort

 Documentation/git-am.txt               |    5 +-
 Documentation/git-rerere.txt           |    2 +-
 contrib/completion/git-completion.bash |    2 +-
 git-am.sh                              |  617 +++++++++++---------------------
 git-rebase.sh                          |    7 +-
 t/t4150-am.sh                          |   27 +-
 6 files changed, 244 insertions(+), 416 deletions(-)

Stephan Beyer (1):
  Migrate rebase-i to sequencer

 git-rebase--interactive.sh    |  438 ++++++++++-------------------------------
 t/t3404-rebase-interactive.sh |    9 +-
 2 files changed, 113 insertions(+), 334 deletions(-)