Default initialiser that does not assign a TraceLogger unless the cache tracing flag is set.
ASCOM.Cache (in ASCOM.Cache.dll) Version: 3c9121baba46811fe6e53a58a05935662261416d
COM (as opposed to .NET) applications must use this initialiser because parameterised initialisers can not be used by COM applications.
Cache tracing can be enabled through the "Trace Cache" option that is set through the Chooser or Diagnostics menus. This will cause the cache to create a separate
log in the same directory as the application's own log.