fmt_peer
char *fmt_peer(const char *, const struct bgpd_addr *, int);
s = fmt_peer(r->descr, &r->remote_addr, -1);
s = fmt_peer(p->conf.descr, &p->conf.remote_addr,
s = fmt_peer(p->conf.descr, &p->conf.remote_addr,
s = fmt_peer(NULL, &p->conf.remote_addr,
descr = fmt_peer(p->conf.descr, &p->conf.remote_addr,