Merge branch 'hotfix' into staging

data/conf/sogo/sogo.conf

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

docker-compose.yml

@@ -523,7 +523,7 @@ services:
             - dockerapi
 
     solr-mailcow:
-      image: mailcow/solr:1.7
+      image: mailcow/solr:1.8
       restart: always
       volumes:
         - solr-vol-1:/opt/solr/server/solr/dovecot-fts/data:Z