* sqgetGlobalVar('username',$username,SQ_SESSION);
* -- no quotes around last param!
*
+ * WARNING: Since 1.4.5 and 1.5.1 function nulls $value,
+ * if variable is not available.
+ *
* @param string name the name of the var to search
* @param mixed value the variable to return
* @param int search constant defining where to look