glob::MatchOptions struct fields should be public
Document that Result.unwrap prints the Err's value

It is implied by the Show bound, but that implication can be missed.
auto merge of #15632 : masklinn/rust/patch-1, r=alexcrichton

I saw that it was bounded by `Show` but the implication is no guarantee (and had only 0.10 to test, where this behavior has been added to 0.11)
auto merge of #15655 : lightsofapollo/rust/glob-match-options-pub, r=alexcrichton

Not sure how to test this correctly I assume the current tests pass now because of the crate boundaries [and that this is fallout from private by default]?
Main example for HashSet.