Add "Why is it named 'Rust'?" to Project FAQ

[dhodder]

Based upon the recent Reddit thread, this acknowledges our fungal
origins and hopefully resolves issue #14727.

[lilyball]

Finally there are many subsequences of the word Rust, like "robust" and "trust", which seem to fit the language.

I don't know what you mean by "subsequences" here.

[dhodder]

Thanks for the feedback. I used "subsequence" where the original explanation had "substring", intending to mean a sequence of characters that can be derived from another sequence by deleting some of the characters. (I believe "rust" is a subsequence of "robust" but not a substring, because "r", "u", "s" and "t" are blocked by "ob".)

Does the following sound clearer?

Finally, the word is hidden within "robust" and "trust", and other words which seem to fit the language.

[lilyball]

@dhodder I think that line should just be deleted.

[brson]

I'm not sure I want to try to answer this. There really isn't a good answer and the post-hoc justifications are just that. If we do try to answer this, I don't want the answer to contain references to fungus or browser chrome: the 'imagery of well-worn tooling' is the closest I've heard to a 'good' answer.

[brson]

Also, nobody knowing what 'Rust' means adds some sort of mystique (though the continual questions about what it means get annoying).

[brson]

My favorite answer to this question might be one that just raises more questions.

[steveklabnik]

I like the idea of there being no single answer to this question. Down with the notion of binary truth! 😉

[dhodder]

Given the lack of consensus then I guess we should close issue #14727 and this PR. Allusive references to well-worn tooling might be better within other documentation rather than something definitive in nature like a FAQ. Thanks all.

[anaran]

See https://github.com/rust-lang/rust/wiki/The-Rusticon#rust