t / t5100 / rfc2047-info-0004on commit add "ok=sigpipe" to test_must_fail and use it to fix flaky tests (8bf4bec)
   1Author: Nathaniel Borenstein (םולש ןב ילטפנ)
   2Email: nsb@thumper.bellcore.com
   3Subject: Test of new header generator
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