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
Regression. In d6a37c23a3 (7.75.0) we removed the duplicated storage
(connection + easy handle), so this info needs be extracted again even
for re-used connections.
Add test 435 to verify
Reported-by: Max Dymond
Fixes#7660Closes#7662