diff --git a/advancedcontentfilter/advancedcontentfilter.php b/advancedcontentfilter/advancedcontentfilter.php
index ce5da9c3..3f036488 100644
--- a/advancedcontentfilter/advancedcontentfilter.php
+++ b/advancedcontentfilter/advancedcontentfilter.php
@@ -39,7 +39,6 @@ use Friendica\Content\Text\Markdown;
 use Friendica\Core\Addon;
 use Friendica\Core\Cache;
 use Friendica\Core\L10n;
-use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Database\DBStructure;
 use Friendica\Model\Item;
@@ -47,7 +46,6 @@ use Friendica\Model\Term;
 use Friendica\Module\Login;
 use Friendica\Network\HTTPException;
 use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Security;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
 use Symfony\Component\ExpressionLanguage;
@@ -91,7 +89,7 @@ function advancedcontentfilter_dbstructure_definition(App $a, &$database)
 			"expression" => ["type" => "mediumtext"  , "not null" => "1", "comment" => "Expression text"],
 			"serialized" => ["type" => "mediumtext"  , "not null" => "1", "comment" => "Serialized parsed expression"],
 			"active"     => ["type" => "boolean"     , "not null" => "1", "default" => "1", "comment" => "Whether the rule is active or not"],
-			"created"    => ["type" => "datetime"    , "not null" => "1", "default" => NULL_DATE, "comment" => "Creation date"],
+			"created"    => ["type" => "datetime"    , "not null" => "1", "default" => DBA::NULL_DATETIME, "comment" => "Creation date"],
 		],
 		"indexes" => [
 			"PRIMARY" => ["id"],
diff --git a/blackout/blackout.php b/blackout/blackout.php
index 28e5567f..9b2d5b62 100644
--- a/blackout/blackout.php
+++ b/blackout/blackout.php
@@ -85,7 +85,7 @@ function blackout_redirect ($a, $b) {
     }
     if (( $date1 <= $now ) && ( $now <= $date2 )) {
         logger('redirecting user to blackout page');
-        goaway($myurl);
+        System::externalRedirect($myurl);
     }
 }
 
diff --git a/catavatar/catavatar.php b/catavatar/catavatar.php
index 27e48b7a..b321ae33 100644
--- a/catavatar/catavatar.php
+++ b/catavatar/catavatar.php
@@ -141,7 +141,7 @@ function catavatar_lookup(App $a, &$b)
 	$url = $a->getBaseURL() . '/catavatar/' . $user['uid'];
 
 	switch($b['size']) {
-		case 175: $url .= "/4"; break;
+		case 300: $url .= "/4"; break;
 		case 80: $url .= "/5"; break;
 		case 47: $url .= "/6"; break;
 	}
@@ -245,7 +245,7 @@ function build_cat($seed = '', $size = 0)
 	if ($size > 3 && $size < 7) {
 		switch ($size) {
 			case 4:
-				$size = 175;
+				$size = 300;
 				break;
 			case 5:
 				$size = 80;
diff --git a/forumdirectory/forumdirectory.php b/forumdirectory/forumdirectory.php
index 0c2aa265..54818cdb 100644
--- a/forumdirectory/forumdirectory.php
+++ b/forumdirectory/forumdirectory.php
@@ -8,6 +8,7 @@
 
 use Friendica\App;
 use Friendica\Content\Nav;
+use Friendica\Content\Pager;
 use Friendica\Content\Widget;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
@@ -45,8 +46,6 @@ function forumdirectory_init(App $a)
 {
 	$a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="' . $a->getBaseURL() . '/addon/forumdirectory/forumdirectory.css" media="all" />';
 
-	$a->set_pager_itemspage(60);
-
 	if (local_user()) {
 		$a->page['aside'] .= Widget::findPeople();
 	} else {
@@ -107,19 +106,22 @@ function forumdirectory_content(App $a)
 
 	$publish = Config::get('system', 'publish_all') ? '' : " AND `publish` = 1 ";
 
+	$total = 0;
 	$r = q("SELECT COUNT(*) AS `total` FROM `profile` LEFT JOIN `user` ON `user`.`uid` = `profile`.`uid`"
 		. " WHERE `is-default` = 1 $publish AND `user`.`blocked` = 0 AND `page-flags` = 2 $sql_extra ");
 	if (DBA::isResult($r)) {
-		$a->set_pager_total($r[0]['total']);
+		$total = $r[0]['total'];
 	}
 
+	$pager = new Pager($a->query_string, 60);
+
 	$order = " ORDER BY `name` ASC ";
 
 	$r = q("SELECT `profile`.*, `profile`.`uid` AS `profile_uid`, `user`.`nickname`, `user`.`timezone` , `user`.`page-flags`"
 		. " FROM `profile` LEFT JOIN `user` ON `user`.`uid` = `profile`.`uid` WHERE `is-default` = 1 $publish"
 		. " AND `user`.`blocked` = 0 AND `page-flags` = 2 $sql_extra $order LIMIT %d , %d ",
-		intval($a->pager['start']),
-		intval($a->pager['itemspage'])
+		$pager->getStart(),
+		$pager->getItemsPerPage()
 	);
 
 	if (DBA::isResult($r)) {
@@ -208,7 +210,7 @@ function forumdirectory_content(App $a)
 		}
 
 		$o .= "<div class=\"directory-end\" ></div>\r\n";
-		$o .= paginate($a);
+		$o .= $pager->renderFull($total);
 	} else {
 		info(L10n::t("No entries \x28some entries may be hidden\x29.") . EOL);
 	}
diff --git a/impressum/impressum.php b/impressum/impressum.php
index 74d87180..90775116 100644
--- a/impressum/impressum.php
+++ b/impressum/impressum.php
@@ -31,7 +31,7 @@ function impressum_module() {
 }
 function impressum_content() {
     $a = get_app();
-    goaway('friendica/');
+    $a->internalRedirect('friendica/');
 }
 
 function obfuscate_email ($s) {
diff --git a/notifyall/notifyall.php b/notifyall/notifyall.php
index 824e306b..852972c3 100644
--- a/notifyall/notifyall.php
+++ b/notifyall/notifyall.php
@@ -93,7 +93,7 @@ function notifyall_post(App $a)
 	}
 
 	notice(L10n::t('Emails sent'));
-	goaway('admin');
+	$a->internalRedirect('admin');
 }
 
 function notifyall_content(&$a)
diff --git a/public_server/public_server.php b/public_server/public_server.php
index 4d552951..2b36f3f6 100644
--- a/public_server/public_server.php
+++ b/public_server/public_server.php
@@ -6,13 +6,13 @@
  * Author: Keith Fernie <http://friendika.me4.it/profile/keith>
  */
 
+use Friendica\App;
 use Friendica\BaseModule;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
 use Friendica\Database\DBA;
 use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Security;
 
 function public_server_install()
 {
@@ -32,7 +32,7 @@ function public_server_uninstall()
 	Addon::unregisterHook('logged_in', 'addon/public_server/public_server.php', 'public_server_login');
 }
 
-function public_server_load_config(\Friendica\App $a)
+function public_server_load_config(App $a)
 {
 	$a->loadConfigFile(__DIR__. '/config/public_server.ini.php');
 }
@@ -59,7 +59,7 @@ function public_server_cron($a, $b)
 	$r = q("SELECT * FROM `user` WHERE `account_expires_on` < UTC_TIMESTAMP() + INTERVAL 5 DAY AND
 		`account_expires_on` > '%s' AND
 		`expire_notification_sent` <= '%s'",
-		DBA::escape(NULL_DATE), DBA::escape(NULL_DATE));
+		DBA::NULL_DATETIME, DBA::NULL_DATETIME);
 
 	if (DBA::isResult($r)) {
 		foreach ($r as $rr) {
@@ -83,7 +83,7 @@ function public_server_cron($a, $b)
 	$nologin = Config::get('public_server', 'nologin', false);
 	if ($nologin) {
 		$r = q("SELECT `uid` FROM `user` WHERE NOT `account_expired` AND `login_date` <= '%s' AND `register_date` < UTC_TIMESTAMP() - INTERVAL %d DAY AND `account_expires_on` <= '%s'",
-			DBA::escape(NULL_DATE), intval($nologin), DBA::escape(NULL_DATE));
+			DBA::NULL_DATETIME, intval($nologin), DBA::NULL_DATETIME);
 		if (DBA::isResult($r)) {
 			foreach ($r as $rr) {
 				$fields = ['account_expires_on' => DateTimeFormat::utc('now +6 days')];
@@ -95,7 +95,7 @@ function public_server_cron($a, $b)
 	$flagusers = Config::get('public_server', 'flagusers', false);
 	if ($flagusers) {
 		$r = q("SELECT `uid` FROM `user` WHERE NOT `account_expired` AND `login_date` < UTC_TIMESTAMP() - INTERVAL %d DAY AND `account_expires_on` <= '%s' AND `page-flags` = 0",
-			intval($flagusers), DBA::escape(NULL_DATE));
+			intval($flagusers), DBA::NULL_DATETIME);
 		if (DBA::isResult($r)) {
 			foreach ($r as $rr) {
 				$fields = ['account_expires_on' => DateTimeFormat::utc('now +6 days')];
@@ -108,7 +108,7 @@ function public_server_cron($a, $b)
 	$flagpostsexpire = Config::get('public_server', 'flagpostsexpire');
 	if ($flagposts && $flagpostsexpire) {
 		$r = q("SELECT `uid` FROM `user` WHERE NOT `account_expired` AND `login_date` < UTC_TIMESTAMP() - INTERVAL %d DAY AND `account_expires_on` <= '%s' and `expire` = 0 AND `page-flags` = 0",
-			intval($flagposts), DBA::escape(NULL_DATE));
+			intval($flagposts), DBA::NULL_DATETIME);
 		if (DBA::isResult($r)) {
 			foreach ($r as $rr) {
 				DBA::update('user', ['expire' => $flagpostsexpire], ['uid' => $rr['uid']]);
@@ -138,7 +138,7 @@ function public_server_login($a, $b)
 	}
 
 	$fields = ['account_expires_on' => DateTimeFormat::utc('now +' . $days . ' days')];
-	$condition = ["`uid` = ? AND `account_expires_on` > ?", local_user(), NULL_DATE];
+	$condition = ["`uid` = ? AND `account_expires_on` > ?", local_user(), DBA::NULL_DATETIME];
 	DBA::update('user', $fields, $condition);
 }
 
diff --git a/startpage/startpage.php b/startpage/startpage.php
index 14b8abbb..b955161b 100644
--- a/startpage/startpage.php
+++ b/startpage/startpage.php
@@ -31,7 +31,7 @@ function startpage_home_init($a, $b)
 
 	$page = PConfig::get(local_user(), 'startpage', 'startpage');
 	if (strlen($page)) {
-		goaway($page);
+		$a->internalRedirect($page);
 	}
 	return;
 }
diff --git a/statusnet/statusnet.php b/statusnet/statusnet.php
index 42c31d75..6cdc2372 100644
--- a/statusnet/statusnet.php
+++ b/statusnet/statusnet.php
@@ -160,7 +160,7 @@ function statusnet_settings_post(App $a, $post)
 					}
 				}
 			}
-			goaway('settings/connectors');
+			$a->internalRedirect('settings/connectors');
 		} else {
 			if (isset($_POST['statusnet-consumersecret'])) {
 				//  check if we can reach the API of the GNU Social server
@@ -188,7 +188,7 @@ function statusnet_settings_post(App $a, $post)
 						notice(L10n::t('We could not contact the GNU Social API with the Path you entered.') . EOL);
 					}
 				}
-				goaway('settings/connectors');
+				$a->internalRedirect('settings/connectors');
 			} else {
 				if (isset($_POST['statusnet-pin'])) {
 					//  if the user supplied us with a PIN from GNU Social, let the magic of OAuth happen
@@ -206,7 +206,7 @@ function statusnet_settings_post(App $a, $post)
 					PConfig::set(local_user(), 'statusnet', 'post', 1);
 					PConfig::set(local_user(), 'statusnet', 'post_taglinks', 1);
 					//  reload the Addon Settings page, if we don't do it see Bug #42
-					goaway('settings/connectors');
+					$a->internalRedirect('settings/connectors');
 				} else {
 					//  if no PIN is supplied in the POST variables, the user has changed the setting
 					//  to post a dent for every new __public__ posting to the wall
diff --git a/twitter/twitter.php b/twitter/twitter.php
index f60625e6..fc6519ae 100644
--- a/twitter/twitter.php
+++ b/twitter/twitter.php
@@ -258,7 +258,7 @@ function twitter_settings_post(App $a)
 				info($e->getMessage());
 			}
 			//  reload the Addon Settings page, if we don't do it see Bug #42
-			goaway('settings/connectors');
+			$a->internalRedirect('settings/connectors');
 		} else {
 			//  if no PIN is supplied in the POST variables, the user has changed the setting
 			//  to post a tweet for every new __public__ posting to the wall