bug#36017: 27.0.50; TLS 1.3 on macOS exhibits similar issue to #34341

[Robert Pluim]

>>>>> On Mon, 03 Jun 2019 12:05:41 +0200, Robert Pluim <rpluim@gmail.com> said:

>>>>> On Mon, 3 Jun 2019 02:53:06 -0700, Aaron Jensen <aaronjensen@gmail.com> 
>>>>> said:
    Robert> And that recipe works fine for me. Iʼll have to try again later 
today
    Robert> when I can use a different network that I have more control over.

Actually, now that I look at it more closely, it does fail for me
(sort of). I donʼt get a blank buffer, but I do get

error in process filter: Staus: 

If I retry in the same session, then I get a 401 as expected.

Iʼll stick some debugging in gnutls.c and see what I can find.

Robert