bring back mail list and cleanup some issues which popped out with full PHP warnings

include/contact_widgets.php

@@ -70,11 +70,11 @@ function fileas_widget($baseurl,$selected = '') {
 
 function categories_widget($baseurl,$selected = '') {
 
+	$a = get_app();
+	
 	if(! feature_enabled($a->profile['profile_uid'],'categories'))
 		return '';
 
-	$a = get_app();
-
 	$terms = array();
 	$r = q("select distinct(term) from term where uid = %d and type = %d order by term asc",
 		intval($a->profile['profile_uid']),

include/dba/dba_mysqli.php

@@ -70,7 +70,7 @@ class dba_mysqli extends dba_driver {
 	function close() {
 		if($this->db)
 			$this->db->close();
-		$this->connected = flase;
+		$this->connected = false;
 	}
 
 }