The test certs are RSA; if NO_RSA is defined the client can neither
load nor verify them. Detect "RSA not supported" in client -? help
and exit 77 (SKIP) before tlslite-ng tries to use the RSA chain.
multi-msg-record.py: auto-detect the CA cert format the wolfSSL client
build accepts (PEM or DER) from the default shown in client -? help.
OPENSSL_EXTRA-style builds need PEM; NO_CODING builds need DER.
ocsp-stapling.test: skip the external login.live.com connection unless
WOLFSSL_EXTERNAL_TEST is explicitly enabled (matches external.test /
google.test convention). Local OCSP tests still run.
ocsp-responder-openssl-interop.test: use ${TMPDIR:-/tmp} for mktemp
templates so the test works when /tmp is not writable.
wolfSSL builds configured with --enable-coding=no cannot parse PEM
because base64 decoding is disabled. Switch the example client's -A
argument to ca-cert.der so the test works in both PEM-enabled and
PEM-disabled builds.
