sshfwd_unthrottle(pr->c, bufsize);
if (pr->c) sshfwd_unthrottle(pr->c, bufsize);
static void pfd_sent(Plug plug, int bufsize){    struct PFwdPrivate *pr = (struct PFwdPrivate *) plug;    sshfwd_unthrottle(pr->c, bufsize);}