[Enigmail] Disable PGP/MIME option

[Brian]

Charly Avital wrote:
> 
> I must assume that you edited prefs.js when Thunderbird was *not*
> running, otherwise the change will not hold.

Yep.  Even checked after restart, TB did move the line on me.  But it 
did stick.

> 
> If you are sure about the syntax, have you tried false instead of 1?
>      user_pref("extensions.enigmail.usePGPMimeOption", false);

Tried the false, same result.  It still gives the radio button and the 
text box warning that not all clients support PGP/MIME.

bri