date column -> last received-from

[Kacper Wysocki <kacperw online no>]

Hi all,
some time ago I posted on this list trying to determine a good way to  
change the 'Date' column to represent the time the message was  
received, as opposed to sent- I would be far less vulnerable to date  
forgery this way. Subject came up lately and I want to revisit this.  
Here's the answer I got from Pawel back when:

>> one could write some elaborate procmail script that parses the email
>> for the last recieved header, extracts the date and overwrites the
>> date header accordingly, but it'd be great if I didn't have to
>> reinvent the wheel, right?
> 
> It is much easier than that: one can just follow the way "Size"
> column is switched between displaying message size in lines and in
> bytes. Track balsa_app.line_length usage through the code.

Sadly, I was never able to do the above. Back then I was none too  
familiar with C, now I'm just none too familiar with the glibs.

Here's what I found, though:
in balsa-index.c lines 395 and onwards the date column gets rendered

in balsa-message.c lines 1196 and 1197 of function display_headers_real ,  
the date header string gets set. My guess is that I need to change what  
sets the date here to a function that parses the last received header  
the way I described above. But if Pawel's comment is any indication,  
there is an easier way to do this, maybe by changing
balsa_app.date_string.

I would be deeply thankful to anyone who would take their time to look  
at this, and maybe explain to a coding newbie (that would be me) what's  
going on.

btw, balsa stability has noticeably improved. Is this a incidental or  
was there an effort 'behind the scenes'? Heh, bugs don't fix  
themselves, so I bet it was the latter. Good job people, your efforts  
are appreciated!

-Kacper

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