Add proper PHP password management

The old crypt based password methods are all deprecated and the new
password_* are now standard.

Also added auto rehash for old password on login

www/admin/class_test.php

@@ -1,4 +1,5 @@
 <?php
+
 $DEBUG_ALL_OVERRIDE = 0; // set to 1 to debug on live/remote server locations
 $DEBUG_ALL = 1;
 $PRINT_ALL = 1;