NEWS for rsync 3.1.0 (UNRELEASED)
Protocol: 31 (changed)
Changes since 3.0.4:

  OUTPUT CHANGES:

    - Output numbers in 3-digit groups by default (e.g. 1,234,567).  See the
      --human-readable option for a way to turn it off.  See also the daemon's
      "log format" parameter and related command-line options (including
      --out-format) for a modifier that can be used to request digit-grouping
      or human-readable output in log escapes. (Note that log output is
      unchanged by default.)  When some level of human-readable output is
      enabled, the column width for the file size in the --list-only output
      is increased.

    - The output of the --progress option has changed:  the string "xfer" was
      shortened to "xfr", and the string "to-check" was shortened to "to-chk",
      both designed to make room for the (by default) wider display of file
      size numbers without making the total line-length longer.  Also, when
      incremental recursion is enabled, the string "ir-chk" will be used
      instead of "to-chk" up until the incremental-recursion scan is done,
      letting you know that the value to check and the total value will still
      be increasing as new files are found.

    - Enhanced the --stats output: 1) to mention how many files were created
      (protocol >= 28), 2) to mention how many files were deleted (new for
      protocol 31, but only output when --delete is in effect), and 3) to
      follow the file-count, created-count, and deleted-count with a subcount
      list broken down by type.

  BUG FIXES:

    - Fixed a bug in incremental recursion transfers where an I/O error might
      not get noticed in time for the receiving side to disable deletions
      (requires protocol 31).

    - Changed the way --progress overwrites its prior output in order to make
      it nearly impossible for the progress to get overwritten by an error.

    - An absolute-path filter rule (i.e. with a '/' modifier) no longer loses
      its modifier when sending the filter rules to the remote rsync.

    - Fixed some rare bugs in --iconv processing that might cause a multibyte
      character to get translated incorrectly.

  ENHANCEMENTS:

    - Added the --remote-option=OPT (-M OPT) command-line option that is useful
      for things like sending a remote --log-file=FILE or --fake-super option.

    - Added the --info=FLAGS and --debug=FLAGS options to allow finer-grained
      control over what is output.  Added an extra type of --progress output
      using --info=progress2.

    - The --msgs2stderr option can help with debugging rsync by allowing the
      debug messages to get output to stderr rather than travel via the socket
      protocol.

    - Added the --delete-missing-args and --ignore-missing-args options to
      either delete or ignore user-specified files on the receiver that are
      missing on the sender (normally the absence of user-specified files
      generates an error).

    - Added a "T" (terabyte) category to the --human-readable size suffixes.

    - Added the --usermap/--groupmap/--chown options for manipulating file
      ownership during the copy.

    - Added the "%C" escape to the log-output handling, which will output the
      MD5 checksum of any transferred file, or all files if --checksum was
      specified (when protocol 30 or above is in effect).

    - Added the "reverse lookup" parameter to the rsync daemon config file to
      allow reverse-DNS lookups to be disabled.

    - Added a way for more than one group to be specified in the daemon's
      config file, including a way to specify that you want all of the
      specified user's groups without having to name them.  Also changed the
      daemon to complain about an inability to set explicitly-specified uid/gid
      values, even when not run by a super-user.

    - Added a way to reference environment variables in a daemon's config file
      (using %VAR% references).

    - When replacing a non-dir with a symlink/hard-link/device/special-file,
      the update should now be done in an atomic manner.

    - Fixed a free of the wrong pointer in uncache_tmp_xattrs() (which only
      sometimes affects an --xattr transfer when --backup is used).

    - When backing up a file, try to hard-link the file into place so that the
      upcoming replacement of the destination file will be atomic.

    - Added the ability to synchronize nano-second modified times.

    - Added a few more default suffixes for the "dont compress" settings.

    - Added some Solaris xattr code.

  EXTRAS:

    - Added an "instant-rsyncd" script to the support directory, which makes
      it easy to configure a simple rsync daemon in the current directory.

    - Added the "mapfrom" and "mapto" scripts to the support directory, which
      makes it easier to do user/group mapping in a local transfer based on
      passwd/group files from another machine.

  INTERNAL:

    - The I/O code was rewritten to be simpler and do bigger buffered reads
      over the socket.  The I/O between the receiver and the generator was
      changed to be standard multiplexed-I/O (like that over the socket).

    - The sender tries to use any dead time while the generator is looking for
      files to transfer in order to do sender-side directory scanning in a more
      parallel manner.

    - A daemon can now inform a client about a daemon-configured timeout value
      so that the client can assist in the keep-alive activity (protocol 31).

    - The filter code received some refactoring to make it more extendable, to
      read better, and do better sanity checking.

    - Really big numbers are now output using our own big-num routine rather
      than casting them to a double and using a %.0f conversion.

    - The pool_alloc library has received some minor improvements in alignment
      handling.

    - Added init_stat_x() function to avoid duplication of acl/xattr init code.

  DEVELOPER RELATED:

    - Added more conditional debug output.