#1050268: make parseaddr 'quote' the contents of quoted strings in addresses.

Also made the doc string for email._parseaddr's 'quote' function more
accurate; I'd love to make the function match the old docstring instead,
but other code uses it according the existing semantics.
diff --git a/Misc/NEWS b/Misc/NEWS
index 4c18199..2a6d494 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -87,6 +87,9 @@
 Library
 -------
 
+- Issue #1050268: parseaddr now correctly quotes double quote and backslash
+  characters that appear inside quoted strings in email addresses.
+
 - Issue #10004: quoprimime no longer generates a traceback when confronted
   with invalid characters after '=' in a Q-encoded word.