Several fixes/improvements on ARC seal & DKIM signature#1869

Merged

ikedas merged 3 commits intosympa-community:mainfrom ikedas:issue-1851_ikedas-02

Sep 29, 2024

+212-270

Commits on Jun 16, 2024

DKIM signing must be done before ARC sealing (sympa-community#1851 )
ikedas
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Commits on Jul 15, 2024

Refactoring
ikedas
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Commits on Jul 16, 2024

DoForward: Messages forwarded via listmaster/owner/editor address should be added DKIM signature if possible.
ikedas
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