kex_send_kexinit
if ((r = kex_send_kexinit(ssh)) != 0)
if ((r = kex_send_kexinit(ssh)) != 0) { /* we start */
return kex_send_kexinit(ssh);
int kex_send_kexinit(struct ssh *);
(r = kex_send_kexinit(ssh)) != 0)