#14062: fix BytesParser handling of linesep for Header objects

This also affected smtplib.SMTP.send_message, which calls BytesParser.
diff --git a/Misc/NEWS b/Misc/NEWS
index b4dcf82..6d6268c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -22,6 +22,9 @@
 Library
 -------
 
+- Issue #14062: Header objects now correctly respect the 'linesep' setting
+  when processed by BytesParser (which smtplib.SMTP.send_message uses).
+
 - Issue #14291: Email now defaults to utf-8 for non-ASCII unicode headers
   instead of raising an error.  This fixes a regression relative to 2.7.