bug#35507: Gnus mojibakifies UTF-8 text/x-patch attachments from Thunderbird

[Robert Pluim]

>>>>> On Wed, 01 May 2019 01:35:09 +0100, Andy Moreton 
>>>>> <andrewjmoreton@gmail.com> said:
    Andy> After a bit of experimenting, this minimal patch appears to
    Andy> fix things.  Should this also allow the user to choose the
    Andy> charset if none is specified, or just hardwire it to utf-8 ?

I think utf-8 is a good fallback if the message doesnʼt specify a
charset. Itʼs not going to produce any worse effects than what we have
now.

Robert