[PATCH resent] send-email: Honor multi-part email messages

[Alexey Shumkin <Alex.Crezoff@gmail.com>]

Let's try to involve Krzysztof Mazur <krzysiek@podlesie.net>
who have met the similar problem recently
(according to this thread http://thread.gmane.org/gmane.comp.version-control.git/208297/focus=208310)
I recitate myself:
>Well, as I understand "current" algorithm:
>1. It assumes that file is one-part email message
>2. Function searches non-ASCII characters in Subject header
>3. If none then it looks non-ASCII characters at message body
>
>my changes are to skip looking at message body of a multi-part
>message as it has parts with their own Content-Type headers
>
>The said above in details:
>1. To set flag when we meet Content-Type: multipart/mixed header
>2. After we processed all headers and did not found non-ASCII characters
>in a Subject we take a look at this flag and exit with 0
>if it is a multi-part message


>>I think your patch is wrong.  What happens when we see a Subject:
>>line with a non-ascii on it that causes an early return of the loop
>>before your new code has a chance to see Content-Type: header?
This function is used to determine "broken" (non-ASCII) headers (to be encode them)
The problem is if "Subject" is not broken, but message body contains non-ASCII chars,
subject is marked as broken and encoded again.

P.S.
To involved: the beginning of thread is here http://thread.gmane.org/gmane.comp.version-control.git/181743

Alexey Shumkin (1):
  send-email: Honor multi-part email messages

 git-send-email.perl   |  5 ++++
 t/t9001-send-email.sh | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+)

-- 
1.8.1.1.10.g9255f3f