Creation of dynamic properties is deprecated

[JiveDig]

We need to set all of the properties at the start of the class.

public $global_groups = array();
public $no_mc_groups = array();
public $cache = array();
public $mc = array();
public $stats = array();
public $group_ops = array();
public $cache_enabled = true;
public $default_expiration = 0;
public $cache_hits = 0;
public $cache_misses = 0;
public $global_prefix = '';
public $blog_prefix = '';
public $debug = false;
public $memcache_debug = array();