bpo-39073: validate Address parts to disallow CRLF (GH-19007)


 Disallow CR or LF in email.headerregistry.Address arguments to guard against header injection attacks.
(cherry picked from commit 614f17211c5fc0e5b828be1d3320661d1038fe8f)

Co-authored-by: Ashwin Ramaswami <aramaswamis@gmail.com>
3 files changed