[SOGo] Increase workers count to 20

[Postfix] Add extended TLS header
[Web] Increase timeout to 10 for docker API connections
[Postfix] Add perl package

data/conf/sogo/sogo.conf

@@ -5,7 +5,7 @@
         PrivateDAndTViewer
     );
 
-    WOWorkersCount = "14";
+    WOWorkersCount = "20";
     SOGoACLsSendEMailNotifications = YES;
     SOGoAppointmentSendEMailNotifications = YES;
     SOGoDraftsFolderName = "Drafts";