Make all libcurl related options use .nf (no fill) for the SYNOPSIS
section - for consistent look. roffit then renders that section using
<pre> (monospace font) in html for the website.
Extended manpage-syntax (test 1173) with a basic check for it.
Closes#8062
In every libcurl option man page there are now 8 mandatory sections that
must use the right name in the correct order and test 1173 verifies
this. Only 14 man pages needed adjustments.
The sections and the order is as follows:
- NAME
- SYNOPSIS
- DESCRIPTION
- PROTOCOLS
- EXAMPLE
- AVAILABILITY
- RETURN VALUE
- SEE ALSO
Reviewed-by: Daniel Gustafsson
Closes#7656
Since HTTPS is "the new normal", this update changes a lot of man page
examples to use https://example.com instead of the previous "http://..."
Closes#5969
