[SOGo] Faster GC: fix for too many SQL connections

data/conf/sogo/sogo.conf

@@ -77,6 +77,9 @@
     SOGoMaximumFailedLoginInterval = 900;
     SOGoFailedLoginBlockInterval = 900;
 
+    GCSChannelCollectionTimer = 60;
+    GCSChannelExpireAge = 60;
+
     MySQL4Encoding = "utf8mb4";
   //SOGoDebugRequests = YES;
   //SoDebugBaseURL = YES;