Added documentation for the new 'country' configuration option

wpa_supplicant/wpa_supplicant.conf

@@ -135,6 +135,11 @@ fast_reauth=1
 # in most cases.
 #driver_param="field=value"
 
+# Country code
+# The ISO/IEC alpha2 country code for the country in which this device is
+# currently operating.
+#country=US
+
 # Maximum lifetime for PMKSA in seconds; default 43200
 #dot11RSNAConfigPMKLifetime=43200
 # Threshold for reauthentication (percentage of PMK lifetime); default 70