All values passed for string option values (except for file names) are converted to lower case

[jajhall]

Closes #3107

[odow]

The counter point to this is that you could accept only the case sensitive strings and error when something doesn't match? (Shouldn't that already be the case?)

[odow]

julia> highs = Highs_create()
Ptr{Nothing}(0x0000000818ef0000)

julia> Highs_setStringOptionValue(highs, "parallel", "On")
ERROR:   Value "On" for parallel option is not one of "off", "choose" or "on"
-1

Seems good to me... I wonder why the OP didn't realise in #3106?

[jajhall]

That's what was done before - other than strings for bool options - but today someone used "On", not "on" for the parallel option. He and I both lost time trying to work out what happened.

Of course he didn't check the HighsStatus::kError return 🙄