Merge pull request #89 from c-jimenez/fix/openssl_tls13_ciphersuites

[websocket] Fix detection of OpenSSL SSL_CTX_set_ciphersuites() to allow to configure TLS1.3 cipher suites

Author: c-jimenez

3rdparty/libwebsockets/lib/tls/CMakeLists.txt

@@ -347,7 +347,7 @@ CHECK_FUNCTION_EXISTS(${VARIA}EVP_aes_128_ctr LWS_HAVE_EVP_aes_128_ctr PARENT_SC
 CHECK_FUNCTION_EXISTS(${VARIA}EVP_aes_128_xts LWS_HAVE_EVP_aes_128_xts PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}RSA_verify_pss_mgf1 LWS_HAVE_RSA_verify_pss_mgf1 PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}HMAC_CTX_new LWS_HAVE_HMAC_CTX_new PARENT_SCOPE)
-CHECK_SYMBOL_EXISTS(${VARIA}SSL_CTX_set_ciphersuites LWS_HAVE_SSL_CTX_set_ciphersuites PARENT_SCOPE)
+CHECK_FUNCTION_EXISTS(${VARIA}SSL_CTX_set_ciphersuites LWS_HAVE_SSL_CTX_set_ciphersuites PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}EVP_PKEY_new_raw_private_key LWS_HAVE_EVP_PKEY_new_raw_private_key PARENT_SCOPE)
 CHECK_FUNCTION_EXISTS(${VARIA}SSL_SESSION_set_time LWS_HAVE_SSL_SESSION_set_time PARENT_SCOPE)
 CHECK_SYMBOL_EXISTS(${VARIA}SSL_SESSION_up_ref LWS_HAVE_SSL_SESSION_up_ref PARENT_SCOPE)