docs: Explain --fail-early does not imply --fail #1375
I made a mistake in some scripts replacing --fail with --fail-early, not remembering the latter doesn't imply the former. You'd think I would know since it looks like I may have been one of the initial reviewers but I don't remember it.
For example I get a bunch of files using --fail-early --location --remote-name-all and they were all written even though one had failed. I think it's an easy mistake to make, and so it should be documented that it's for transfer errors and does not imply --fail but can be combined with it.
Not in this commit: