[Bug 1392558] [NEW] Display name needs to be rewritten for list address

[Franck]

Public bug reported:

When in DMARC mode, the list will rewrite the From: to something like
From: "John via list" <list at mailman.org>

Some client when replying to all will move this address with the display part to the To: field
From: "Paul" <paul at example.com>
To: "John via list" <list at mailman.org>

When the list redistribute the message to subscribers, it keeps the To: as is (as it contains the list email address). The display name should be removed to put back the list address. 
From: "Paul via List" <list at mailman.org>
To: "John via list" <list at mailman.org>
-->
From: "Paul via List" <list at mailman.org>
To: "list" <list at mailman.org>

** Affects: mailman
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1392558

Title:
  Display name needs to be rewritten for list address

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