have been refused on the server daemon.  This allows us to reject
  implied options (e.g. if --partial is refused and -P specified).
- Changed the handling of the --delete refusals from the old idiom
  of upgrading "delete" to "delete*" into the new idiom of checking
  if refused_delete is set when we determine --delete was implied.
- Changed the --del option from a popt alias into a normal option.
- Mark all the daemon options as refused when a daemon is parsing
  the over-the-socket options.
- Created a new function, create_refuse_error(), which is now called
  from all the spots that check for refused options.
- Don't call clean_fname() on an empty string -- either reject it
  or handle it without erroneously expanding the string.
- If --delay-updates was specified without a --partial-dir option,
  don't send the default "--partial-dir=.~tmp~" option if the server
  is the receiver -- just let it default.