To make special newlines more explicit and visible.
Mostly in `<protocol>` sections, some in `<data*>` and `<upload>`.
Reducing the number of `tests/data/test*`:
- CRLF newlines from 21535 to 11337.
- files with mixed newlines from 1335 to 707.
Also delete empty `<protocol>` sections.
Closes#19284
Very similar to 9f8bdd0eae, but affects
e.g. netrc file parsing.
Suggested-by: Graham Christensen <graham@grahamc.com>
Add test 744 to verify
Closes#17036