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outdated text that said it was a non-standard option.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

synonymous with --max-delete=0.  We also pass a request for 0
deletions to the server as --max-delete=-1.  This ensures that we
can send a backward-compatible option to old and new versions alike.

special files.

(A temporary measure until some bugs can be fixed.)

  fails, we must make sure that the item we're skipping has a name that
  is still inside the missing hierarchy by using a prefix matching func.
- We now handle the failure to remove a file to create a dir the same
  way as a failed mkdir() (skipping the failed dir's contents).

- Added f_name_has_prefix().

suffix match stay in the wildcard-matching list.

for the default set of non-compressed file suffixes.

- Optimized the matching of non-compressing file suffixes.