ZP-865 Abort conflict detection if there are more 100 changes to be

exported.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/zarafa/importer.php

@@ -309,6 +309,11 @@ class ImportChangesICS implements IImportChanges {
             // monitor how long it takes to export potential conflicts
             // if this takes "too long" we cancel this operation!
             $potConflicts = $exporter->GetChangeCount();
+            if ($potConflicts > 100) {
+                ZLog::Write(LOGLEVEL_WARN, sprintf("ImportChangesICS->lazyLoadConflicts(): conflict detection abandoned as there are too many (%d) changes to be exported.", $potConflicts));
+                $this->conflictsLoaded = true;
+                return;
+            }
             $started = time();
             $exported = 0;
             try {