the code to use the structures and functions calls.

- Tweaked a {read,write}_varint30() call set that didn't need to be "30".

to support 2 sizes of key (32 and 64 bits), and to have a non-allocating
option for the find routine (returning NULL for no match).

all the time-preserving semantics into preserve_times.

what is being expanded.

rsync.  Just make them a no-op.

so the code could try to free an extent twice in certain circumstances.

(Thanks to Brion Vibber.)

environment variable.

outdated text that said it was a non-standard option.

- Don't refer to --files-from in the talk of incremental recursion,
  since it might make people think that --files-from disables
  incremental recursion for any recursively scanned directories.

- Make sure that non-inc-recurse mode sets FLAG_XFER_DIR on all
  the non-implied directories.
- Don't set FLAG_XFER_DIR on non-directories.

- Incremented the SUBPROTOCOL_VERSION number.

works properly:  rsync://backup@otherbox/module/a:123:b

systems was failing to work right.