- Use the latest F_DIR_*() defines (whose names were tweaked).

- Define and use ACL_BUMP(), fixing a clash between -A and -x in a
  directory's data.
- Tweaked the F_DIR_*() defines to have more consistent names.
- Don't make F_SUM() return a char pointer that is const.

to make the naming consistent.

the same as earlier protocols.

  file list's contents.  Instead, it handles a parent dir prior to each
  extra file list.  This makes the dir-processing order the same in
  protocol 30 as it is in earlier protocols.
- Moved the permission-fudging code for dirs into recv_generator() to
  make the new protocol-30 dir-handling logic easier.

start, it refers to the file list's parent dir.

- Leave a 1-entry gap between incremental file lists so that we can use
  that index value to refer to the parent directory of each file list.
- Set and use the new ndx_end value in the file list.  The incremental
  recursion mode omits dirs in this value (except in the first list)
  since the generator will be using the new "gap" ndx value to process
  each parent dir.

- Added ndx_end value to struct file_list.

by get_dirlist().

be empty items that make the count inaccurate (and the name
somewhat deceiving).

anymore, as the sender code never concatenates the F_PATHNAME() value
with the dirname+basename string these days.

when the code is about to use the [ug]id_ndx value as an index (since
this saves a memory reference).

user specified -X twice.

values to index into the file-list extra-attribute array instead
of abusing the preserve_FOO variables.

it should free all old mem and reset to an empty state.

we use less memory, especially in small transfers.  As file lists are
discarded, we use the new pool_boundary() and pool_free_old() functions
to discard pool extents that are no longer needed.

- Added a pool_boundary variable to struct file_list.

free all wholly affected extents older than a particular point in time.

punctuation, and fix some typos.

  item was trying to make that memory available to the pool, but it
  failed to adjust the right variable.
- Fixed a bug in pool_free() where the return of the entire live
  extent back to unallocated status did not obey POOL_CLEAR.
- Use the new() and new_array() functions instead of malloc().
- Changed the sqew variable to skew.
- Some other minor formatting tweaks.

- Don't rewrite the last byte of a file in sparse mode when the
  file didn't end with a null char.

pointed out.

This is more in keeping with the way cp works, and also makes the dir-
joining code (in inc_recurse mode) easier.