hostapd: add utf8_ssid flag & enable as default

SSIDs may contain UTF8 characters but ideally hostapd should be told
this is the case so it can advertise the fact. Default enable this
option.

add uci option utf8_ssid '0'/'1' for disable/enable e.g.

config wifi-iface
	option utf8_ssid '0'

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

package/network/services/hostapd/Makefile

@@ -7,7 +7,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=hostapd
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE_URL:=http://w1.fi/hostap.git
 PKG_SOURCE_PROTO:=git

package/network/services/hostapd/files/hostapd.sh

@@ -168,7 +168,7 @@ EOF
 
 hostapd_common_add_bss_config() {
 	config_add_string 'bssid:macaddr' 'ssid:string'
-	config_add_boolean wds wmm uapsd hidden
+	config_add_boolean wds wmm uapsd hidden utf8_ssid
 
 	config_add_int maxassoc max_inactivity
 	config_add_boolean disassoc_low_ack isolate short_preamble
@@ -258,7 +258,7 @@ hostapd_set_bss_options() {
 		maxassoc max_inactivity disassoc_low_ack isolate auth_cache \
 		wps_pushbutton wps_label ext_registrar wps_pbc_in_m1 wps_ap_setup_locked \
 		wps_independent wps_device_type wps_device_name wps_manufacturer wps_pin \
-		macfilter ssid wmm uapsd hidden short_preamble rsn_preauth \
+		macfilter ssid utf8_ssid wmm uapsd hidden short_preamble rsn_preauth \
 		iapp_interface eapol_version dynamic_vlan ieee80211w nasid \
 		acct_server acct_secret acct_port acct_interval \
 		bss_load_update_period chan_util_avg_period sae_require_mfp
@@ -277,6 +277,7 @@ hostapd_set_bss_options() {
 	set_default acct_port 1813
 	set_default bss_load_update_period 60
 	set_default chan_util_avg_period 600
+	set_default utf8_ssid 1
 	
 	append bss_conf "ctrl_interface=/var/run/hostapd"
 	if [ "$isolate" -gt 0 ]; then
@@ -296,6 +297,7 @@ hostapd_set_bss_options() {
 	append bss_conf "wmm_enabled=$wmm" "$N"
 	append bss_conf "ignore_broadcast_ssid=$hidden" "$N"
 	append bss_conf "uapsd_advertisement_enabled=$uapsd" "$N"
+	append bss_conf "utf8_ssid=$utf8_ssid" "$N"
 
 	[ "$tdls_prohibit" -gt 0 ] && append bss_conf "tdls_prohibit=$tdls_prohibit" "$N"