hostapd: Add alternative format for configuring SSID

The new ssid2 parameter can be used as an alternative mechanism for
configuring SSID for hostapd. It uses the same formats that
wpa_supplicant uses in the configuration file for strings.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/utils/common.c

@@ -566,3 +566,15 @@ char * wpa_config_parse_string(const char *value, size_t *len)
 		return (char *) str;
 	}
 }
+
+
+int is_hex(const u8 *data, size_t len)
+{
+	size_t i;
+
+	for (i = 0; i < len; i++) {
+		if (data[i] < 32 || data[i] >= 127)
+			return 1;
+	}
+	return 0;
+}