Convert non ASCII ssid for display to utf8

Convert hex bytes to binary. Assumes utf8 encoding

includes/wifi_functions.php

@@ -190,3 +190,12 @@ function reinitializeWPA($force)
     return $result;
 }
 
+/*
+ * Replace escaped bytes (hex) by binary - assume UTF8 encoding
+ *
+ * @param string $ssid
+ */
+function ssid2utf8($ssid) {
+    return  evalHexSequence($ssid);
+}
+