Re: GSSENC'ed connection stalls while reconnection attempts.

I wrote:
> Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> writes:
>> If psql connected using GSSAPI auth and server restarted, reconnection
>> sequence stalls and won't return.

> Yeah, reproduced here. (I wonder if there's any reasonable way to
> exercise this scenario in src/test/kerberos/.)

I tried writing such a test based on the IO::Pty infrastructure used
by src/bin/psql/t/010_tab_completion.pl, as attached. It works, but
it feels pretty grotty, especially seeing that so much of the patch
is copy-and-pasted from 010_tab_completion.pl. I think if we want
to have a test like this, it'd be good to work a little harder on
refactoring so that more of that code can be shared. My Perl skillz
are a bit weak for that, though.

regards, tom lane