[PATCH 0/5] per branch options for git-merge incl. --no-ff

This patch-series implements support for per branch configuration of
git-merge, using entries (branch.<name>.mergeoptions) in .git/config.

There is also a new option, --no-ff, which can be used to force git-merge
to create merge commits even when the merge was a fast-forward.

Finally, the new optiond --ff and --commit can be used to override
setting specified in .git/config.

Note: patch 1/5 is a resend of the testscript for git-merge, this time
with correct mode bits.

Shortlog:
     Add test-script for git-merge porcelain
     git-merge: refactor option parsing
     git-merge: add support for branch.<name>.mergeoptions
     git-merge: add support for --commit
     git-merge: add --ff and --no-ff options

Diffstat:
 Documentation/config.txt        |    6 +
 Documentation/git-merge.txt     |    4 +
 Documentation/merge-options.txt |   13 ++
 git-merge.sh                    |   56 +++++-
 t/t7600-merge.sh                |  414 +++++++++++++++++++++++++++++++++++++++

 5 files changed, 483 insertions(+), 10 deletions(-)