[Web] Fix log line handling

[Web] Add mailcow UI logs
[Web] Changes to _SESSION['return'] logic and logger (more to come)
[Web] Show last login
[Web, Postfix] Allow to disable sender check completely
[Web] Many minor fixes
[Web] Update some libs

data/web/inc/vars.inc.php

@@ -120,3 +120,5 @@ $RELAY_TO = "null@hosted.mailcow.de";
 // How long to wait (in s) for cURL Docker requests
 $DOCKER_TIMEOUT = 60;
 
+// Anonymize IPs logged via UI
+$ANONYMIZE_IPS = true;