[Mutt] #2976: Mutt writes unsolicited "Lines" and "Content-Length" headers

[Mutt <fleas@xxxxxxxx>]

#2976: Mutt writes unsolicited "Lines" and "Content-Length" headers

 This annoyed me since the first day that I started using mutt: The
 unsolicted "Lines" and "Content-Length" headers that mutt adds to existing
 mailbox files. These should be kept up to date if they are already
 present, perhaps added to newly created messages, but not added to
 existing mailbox files.

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Ticket URL: <http://dev.mutt.org/trac/ticket/2976>