ssl_cert_lookup_by_idx
cl = ssl_cert_lookup_by_idx(idx, ctx);
__owur const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx, SSL_CTX *ctx);
= ssl_cert_lookup_by_idx(i, SSL_CONNECTION_GET_CTX(s));
clu = ssl_cert_lookup_by_idx(lu->sig_idx,
const SSL_CERT_LOOKUP *clu = ssl_cert_lookup_by_idx(sig_idx,