GUACAMOLE-1020: Correct issues with DST not being interpreted correctly.

extensions/guacamole-auth-restrict/src/main/java/org/apache/guacamole/calendar/DailyRestriction.java

@@ -122,7 +122,7 @@ public class DailyRestriction {
      *     otherwise false.
      */
     public boolean appliesNow() {
-        DayOfWeek currentDay = LocalDate.now().getDayOfWeek();
+        DayOfWeek currentDay = LocalDate.now(ZoneId.of("UTC")).getDayOfWeek();
         LocalTime currentTime = LocalTime.now(ZoneId.of("UTC"));
         
         // Check that we are in the specified time restriction