- Simplified the output format by putting all the long-name
  options into a single hash.

- Made the user-config sections easier to find.
- Default to running a fully-specified rsync executable so that there
  are not PATH surprises.
- A few minor tweaks to the arg-checking code to make it clearer without
  actually changing its logic.

  options.
- Fixed the expanding of wildcards for a restriction of '/'.

  can't fool us into thinking we're the sender by using a filename
  of --sender (or similar ploy).
- Make sure that our '..' check can't be fooled by sly backslashing.
- Tweaked some comments.

- Fully parse all legal options that might come from a stock rsync and
  validate/restrict any option's args (previously we rejected options
  with args).
- Made it easy to disable specific options.
- Properly handle a multi-arg copy's multiple args.
- Make sure that the restricted dir actually exists and we can chdir
  to it.
- Just reject any dangerous args that have .. in them instead of trying
  to munge them.
- We don't treat single-or double-quotes specially, just backslash-
  escaped characters.
- Turn on strict mode.
- Use the array-arg version of exec() so that we don't spawn a shell.
- Use File::Glob to glob wildcards in args.
- Tweaked the log-file format so that it logs the modified command
  without any "OK" suffix.

options.

empty list so that it can't cause a crash if it gets passed to
flist_find().

- Twiddled where the calls to filter_outfile happen.

OSes.

  debugging on failures.
- Added the function filter_outfile() and used it in place of the
  various output-filtering commands.
- Use the sed rules for filtering the combination of --itemized
  output with double-verbose output so that we're sure there's no
  superfluous lines being output (which the old grep filtering
  would have ignored).

need to remove any old symlink/device/file to create the backup.
Also fixed a couple minor logic errors in the handling of symlinks
and devices.  NOTE:  the code still doesn't handle the changing of
a name from a dir to a non-dir or visa versa (which is a very old
deficiency in the code).

permissions difference when copying symlinks.

group "nobody" or "nogroup".

double-verbose output) is happening correctly.

  when verbose > 1.
- An unchanged hard-link with -i (log-format w/%i) now changes the
  trailing dots to spaces.

linked up as it should be and --times was not enabled.

  output is enabled.
- Go back to outputting '"FOO" is a hard link' message when -i (%i)
  is not enabled and verbose > 1.