[PATCH] Allow adding arbitary lines in the mail header generated by format-patch.

Entries may be added to the config file as follows:

[format]
         headers = "Organization: CodeWeavers\nTo: wine-patches 
[off-list ref]\n"

---

  git-format-patch.sh |    8 ++++++--
  1 files changed, 6 insertions(+), 2 deletions(-)