[PATCH 0/4] Loosening "two project merge" safety

Yaroslav Halchenko gave a vague "forcing 'git merge' users to always give --allow-unrelated-histories option when they create crap/insane merges are not nice", which I couldn't guess the validity due to lack of concrete use case. Just in case it is substantiated, here is a series to selectively and safely loosen the safety for specific use cases and users.

Junio C Hamano (4):
  t3033: avoid 'ambiguous refs' warning
  pull: pass --allow-unrelated-histories to "git merge"
  merge: GIT_MERGE_ALLOW_UNRELATED_HISTORIES environment
  merge: introduce merge.allowUnrelatedhistories configuration option

 Documentation/git-merge.txt     | 14 +-------------
 Documentation/git.txt           |  7 +++++++
 Documentation/merge-config.txt  |  7 +++++++
 Documentation/merge-options.txt |  8 ++++++++
 builtin/merge.c                 |  6 ++++++
 builtin/pull.c                  | 11 +++++++++++
 t/t3033-merge-toplevel.sh       | 31 ++++++++++++++++++++++++++++++-
 t/t5521-pull-options.sh         | 28 ++++++++++++++++++++++++++++
 8 files changed, 98 insertions(+), 14 deletions(-)