[SOGo] Reduce workers to 7 by default

data/conf/sogo/sogo.conf

@@ -5,7 +5,7 @@
         PrivateDAndTViewer
     );
 
-    WOWorkersCount = "20";
+    WOWorkersCount = "7";
     SOGoACLsSendEMailNotifications = YES;
     SOGoAppointmentSendEMailNotifications = YES;
     SOGoDraftsFolderName = "Drafts";
@@ -36,7 +36,7 @@
     SOGoMailingMechanism = smtp;
     SOGoSMTPAuthenticationType = plain;
 
-    SxVMemLimit = 512;
+    SxVMemLimit = 384;
 
     SOGoMaximumPingInterval = 354;