OPT_LIMITS
OPT_LIMITS, &lcp_wantoptions[0].neg_mru, PPP_MAXMRU, PPP_MINMRU },
"Set our MTU", OPT_LIMITS|OPT_A2COPY, &lcp_allowoptions[0].mrru,
OPT_LIMITS, &lcp_wantoptions[0].neg_mrru, PPP_MAXMRU, PPP_MINMRU },
switch (opt->flags & OPT_LIMITS) {
case OPT_LIMITS: