SSL_pending
ret = SSL_pending(ssl);
LSSL_USED(SSL_pending);
int SSL_pending(const SSL *s);
LSSL_ALIAS(SSL_pending);
ssl_pending = read_ssl && SSL_pending(con);
pending = SSL_pending(con);
read_from_sslcon = SSL_pending(con);
if (SSL_pending(con))
if (current == io && IO_READING(io) && SSL_pending(io->tls))