ieee80211_add_capinfo
frm = ieee80211_add_capinfo(frm, ic, ic->ic_bss);
frm = ieee80211_add_capinfo(frm, ic, ni);
frm = ieee80211_add_capinfo(frm, ic, ni);
extern u_int8_t *ieee80211_add_capinfo(u_int8_t *, struct ieee80211com *,