to rename a directory over a file or visa versa, try to handle it.

older versions: (1) we no longer complain if excluded files
sticking around cause us to not be able to remove a subdir, and
(2) we output the name of the removed subdir after it has been
successfully removed.

- Added AC_C_LONG_DOUBLE for snprintf.c code.
- Got rid of unneeded ino_t check.

- No need to separately test for (make_backups && !backup_dir)
  because omit_dir_times is now set under those circumstances.

  removing files we just backed up to the current directory and to
  rename a non-empty dir to dir~ (when no backup-dir is specified).
- Made delete_missing() static.

- Only send an explicitly specified -O (--omit-dir-times)
  if it won't be inferred by the receiver.

This is used by the devices.test script.

to diff the devices against each other.

- Added --detach (a --daemon option).

other items.

enablement.

- Tweaked the order of the code in my_modf() to avoid
  a compiler warning.

only allocates memory to store needed bits, it sparsely allocates
the bits in 16KB chunks, and the bit-finding loop works in a more
efficient manner.

and isprint().

to try to fix another problem under solaris.

under solaris.

the MSG_SUCCESS messages until we actually move the files into
place at the end.

  FLAG_SENT.
- Added successful_send(), which is called when MSG_SUCCESS was
  received from the receiver/generator side.  This function
  validates the message, and removes the indicated file/symlink
  (assuming that remove_sent_files was actually set).

file, send MSG_SUCCESS to the sender (through the generator).

  a read-only module.
- If need_messages_from_generator is set, make sure that the
  connection between the generator to the sender has multiplexed
  I/O enabled.

sender.

is enabled, tell the sender about it via MSG_SUCCESS.

- If a server is refusing "delete" and we're the sender, also refuse
  the --remove-sent-files option.