Summary regarding NUL in email messages

[Ken Hornstein]

I meant to send this out earlier, but I wanted to summarize what I think
are the prevailing attitudes about NUL characters in email messages
that I asked about in February:

- It seems like NULs are just not that common in the real world, so no
  urgent changes are required
- We should probably try to do better when code is updated/modernized.

Any dissenters from this view?

--Ken