GnuTLS 3.4.x doesn't allow repeated `-p PORT` arguments.
OpenSSL 1.0.2 has different logs. For TLS 1.2 test cases, use a line that
is present in logs from OpenSSL 1.0.2g, 3.3.0 and presumably all versions
in between.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>