docs: improve units and default values

[ldez]

Improves xxx_POLLING_INTERVAL, xxx_PROPAGATION_TIMEOUT, xxx_TTL, xxx_HTTP_TIMEOUT, xxx_SEQUENCE_INTERVAL descriptions.

Related to #2395

[dmke]

I haven't completed my review yet (Github requires me to "load diff" manually for the last ~100 changed file, which is exhausting), but so far I don't have complaints :)

Would you mind adding a .gitattributes file with the following contents?

**/zz_gen_*.*   linguist-generated

This should auto-collapse generated files in the diff view.

[ldez]

When I opened the PR I wondered if I should add an .gitattributes file.

tips: you can ctrl+click on the arrow at the beginning of a file to collapse all the files.

[dmke]

you can ctrl+click on the arrow at the beginning of a file to collapse all the files

That didn't work for me. Scrolling down a bit however, and checking the "viewed" box will jump me to the next file, and keep that file's "viewed" checkbox under the cursor.

[ldez]

Sorry this is Alt + click

[dmke]

Hm, alt+click does collapse/expand all file panels, but it does not load the diff (which is kind of important ;-)).

[ldez]

The only trick to load all the files is a JS hack:

document.querySelectorAll('.load-diff-button').forEach(node => node.click())