Some friends of mine were having trouble with encrypted messages of
mine sent by sup. From the commit message:


Stop double quoting the protocol when sending encrypted emails

It was the case that when encrypting emails, the content-type
header line would look like:
Content-Type: multipart/encrypted;
boundary="=-1287680456-54319-281-6673-1-=";
protocol=""application/pgp-encrypted""
It appears that rmail adds the extra quotes, so this change
makes the protocol unquoted to start with, so we end up with
correct quoting.


Hamish Downer