- it() A bf(c) means the checksum of the file is different and will be
- updated by the file transfer (requires bf(--checksum)).
+ it() A bf(c) means either that a regular file has a different checksum
+ (requires bf(--checksum)) or that a symlink, device, or special file has
+ a changed value.
+ Note that if you are sending files to an rsync prior to 3.0.1, this
+ change flag will be present for checksum-differing regular files.