kex_names_cat
if ((tmp = kex_names_cat(def, list + 1)) == NULL) {
if ((tmp = kex_names_cat(list + 1, def)) == NULL) {
if ((tmp = kex_names_cat(ret, matching)) == NULL) {
if ((cp = kex_names_cat(kexalgos, ssh->kex->server ?
char *kex_names_cat(const char *, const char *);