[PATCH v2 0/4] handle multiline in-body headers

This is an iteration of the patch set after the discussion in
 <cover.1474047135.git.jonathantanmy@google.com>.

Changes:
o largely rewritten to follow Junio's suggested design (refactor of
  check_header to separate out ">From" and "[PATCH]", and an
  is_inbody_header function performing an airtight check on whether a
  line is an in-body header)
o simpler try_convert_to_utf8 API
o one file of the expected output of t/t5100/*0015 is modified (instead
  of the input)
o t/t5100/*0018--no-inbody-headers test files added
o example in commit message improved following Peff's suggestion

Jonathan Tan (4):
  mailinfo: separate in-body header processing
  mailinfo: refactor to support utf8 decode attempts
  mailinfo: make is_scissors_line take plain char *
  mailinfo: handle in-body header continuations

 mailinfo.c                           | 164 ++++++++++++++++++++++++++---------
 mailinfo.h                           |   1 +
 t/t4150-am.sh                        |  23 +++++
 t/t5100-mailinfo.sh                  |   2 +-
 t/t5100/info0018                     |   5 ++
 t/t5100/info0018--no-inbody-headers  |   5 ++
 t/t5100/msg0015                      |   2 -
 t/t5100/msg0018                      |   2 +
 t/t5100/msg0018--no-inbody-headers   |   8 ++
 t/t5100/patch0018                    |   6 ++
 t/t5100/patch0018--no-inbody-headers |   6 ++
 t/t5100/sample.mbox                  |  19 ++++
 12 files changed, 198 insertions(+), 45 deletions(-)
 create mode 100644 t/t5100/info0018
 create mode 100644 t/t5100/info0018--no-inbody-headers
 create mode 100644 t/t5100/msg0018
 create mode 100644 t/t5100/msg0018--no-inbody-headers
 create mode 100644 t/t5100/patch0018
 create mode 100644 t/t5100/patch0018--no-inbody-headers