Fix cache timestamp comparisons

Core/Net/NetFileCache.cs

@@ -219,7 +219,7 @@ private string scanDirectory(Dictionary<string, string> files, string findHash,
  // Check local vs remote timestamps; if local is older, then it's invalid.
  // null means we don't know the remote timestamp (so file is OK)
  if (remoteTimestamp == null
- || remoteTimestamp < File.GetLastWriteTime(file).ToUniversalTime())
+ || remoteTimestamp < File.GetLastWriteTimeUtc(file))
  {
  // File not too old, use it
  log.Debug("Found good file, using it");

Core/Registry/Registry.cs

@@ -423,7 +423,11 @@ public void Rollback(Enlistment enlistment)
  // we had previously.
 
  lock (txMutex) {
- var options = new JsonSerializerSettings {ObjectCreationHandling = ObjectCreationHandling.Replace};
+ var options = new JsonSerializerSettings
+ {
+ DateTimeZoneHandling = DateTimeZoneHandling.Utc,
+ ObjectCreationHandling = ObjectCreationHandling.Replace
+ };
 
  JsonConvert.PopulateObject(transaction_backup, this, options);
 

Core/Registry/RegistryManager.cs

@@ -307,6 +307,7 @@ private void Load(RepositoryDataManager repoData)
  // after deserialisation.
  var settings = new JsonSerializerSettings
  {
+ DateTimeZoneHandling = DateTimeZoneHandling.Utc,
  Context = new StreamingContext(StreamingContextStates.Other, gameInstance)
  };
 

Core/Repositories/RepositoryData.cs

@@ -144,6 +144,7 @@ public static RepositoryData FromJson(string path, IProgress<int> progress)
  {
  var settings = new JsonSerializerSettings()
  {
+ DateTimeZoneHandling = DateTimeZoneHandling.Utc,
  Context = new StreamingContext(
  StreamingContextStates.Other,
  progress == null

Core/Types/CkanModule.cs

@@ -341,7 +341,10 @@ public CkanModule(string json, IGameComparator comparator)
  try
  {
  // Use the json string to populate our object
- JsonConvert.PopulateObject(json, this);
+ JsonConvert.PopulateObject(json, this, new JsonSerializerSettings
+ {
+ DateTimeZoneHandling = DateTimeZoneHandling.Utc,
+ });
  }
  catch (JsonException ex)
  {

Netkan/Services/ModuleService.cs

@@ -333,6 +333,7 @@ public static AvcVersion GetInternalAvc(ZipFile zipfile, ZipEntry avcEntry)
  private const string SpaceWarpInfoFilename = "swinfo.json";
  private static readonly JsonSerializerSettings ignoreJsonErrors = new JsonSerializerSettings()
  {
+ DateTimeZoneHandling = DateTimeZoneHandling.Utc,
  Error = (sender, e) => e.ErrorContext.Handled = true
  };