Fix use of requires_config_enabled in ssl-opt.sh

requires_config_enabled doesn't support multiple config options.
Tests having multiple configuration dependencies must be prefixed
with multiple invocations of requires_config_enabled instead.

tests/ssl-opt.sh

diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index a189fd6..a5ebe6d 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1361,7 +1361,8 @@
             "$P_CLI dtls=1 cid=1 force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-CBC-SHA256" \
             0
 
-requires_config_enabled MBEDTLS_SSL_CID MBEDTLS_SSL_RENEGOTIATION
+requires_config_enabled MBEDTLS_SSL_CID
+requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
 run_test    "Connection ID: Client+Server enabled, renegotiate" \
             "$P_SRV dtls=1 cid=1 cid_val=dead renegotiation=1" \
             "$P_CLI dtls=1 cid=1 cid_val=beef renegotiation=1 renegotiate=1" \