add "autoselect" mode and "auto" alias: these let you reset the

"phy mode" to an auto-selecting mode, as opposed to one where
you're locked to a particular one (e.g. 11a for 802.11)

sys/net/if_media.h

@@ -447,12 +447,18 @@ struct ifmedia_description {
 }
 
 #define	IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS {			\
+	{ IFM_AUTO, "autoselect" },					\
 	{ IFM_IEEE80211_11A, "11a" },					\
 	{ IFM_IEEE80211_11B, "11b" },					\
 	{ IFM_IEEE80211_11G, "11g" },					\
 	{ 0, NULL },							\
 }
 
+#define	IFM_SUBTYPE_IEEE80211_MODE_ALIASES {				\
+	{ IFM_AUTO, "auto" },						\
+	{ 0, NULL },							\
+}
+
 # define IFM_SUBTYPE_ATM_DESCRIPTIONS {					\
 	{ IFM_ATM_UNKNOWN,	"Unknown" },				\
 	{ IFM_ATM_UTP_25,	"UTP/25.6MBit" },			\