Autosave update, updated vehicle save code debugs

Autosave code now only runs when players are online (to save log space)

Vehicle deletion is now printed to the console (bug hunting for randomly
disappearing vehicles) Vehicle files are now only deleted if the target
owner name and existing owner name do not match (that might have been
what was causing disappearing vehicles if the files were removed then
the server shut off before new files could be written)

More on this bug will be released once it's investigated and fixed.