Re: disabled SSL log_like tests

I filed a report with the LibreSSL folks, and the answer was basically
"yeah, we know RSA-PSS doesn't work; there are multiple things that
need fixing" [1].  So it seems like we'd better find a way to skip
that test case when using LibreSSL.  Not sure what the most
appropriate check would look like.

            regards, tom lane

[1] https://marc.info/?l=libressl&m=174664225002441&w=2