gen.pl now generates a warning if the "See Also" field is not filled in for a
command line option
All command line options now provide one or more related options. 167
"See alsos" added!
Closes#8019
... and allow single quotes to be used "normally" in the .d files.
Makes the output curl.1 use better nroff.
Reported-by: Sergio Durigan Junior
Ref: #7928Closes#7933
The file format for each option now features a "Example:" header that
can provide one or more examples that get rendered appropriately in the
output. All options MUST have at least one example or gen.pl complains
at build-time.
This fix also does a few other minor format and consistency cleanups.
Closes#7654