cmake HAVE_SSL_SET_QUIC_TLS_CBS examples

nghttp2/nghttp2 CMakeLists.txt :191 

check_symbol_exists(SSL_set_quic_tls_cbs "openssl/ssl.h" HAVE_SSL_SET_QUIC_TLS_CBS)

nghttp2/nghttp2 CMakeLists.txt :290 

elseif(HAVE_SSL_SET_QUIC_TLS_CBS)