Reconcile hybrid vs PXP throughout the spec

[timcappalli]

• Don't change enums, hybrid should stay
• Update hybrid references to talk about PXP
• Update spec references
• Consider where PXP terminology should be used

[lgarron]

Sorry if this covered somewhere else, but I'm wondering what PXP refers to?

I can't find another mention of it in this repo, or on the wider internet associated with WebAuthn.

[zacknewman]

@lgarron, good question. Based on some context clues—namely hybrid whose legacy name is caBLE—a DuckDuckGo search of "pxp vs. ble" returns the likely answer: Proximity Profile. More information about it can be found here. Looks like my "guess" was wrong.

Edit

@MasterKale, care to expand on the "thumbs down" please? I wasn't trying to be rude with my response, so I apologize if that's how it came off. If my "guess" is wrong, then I'd also like to know what PXP means. I was being sincere when I said "good question" because I too haven't heard of PXP before nor do I think it's obvious on how to figure it out. I was merely explaining the steps I took to answer the question with the hope of showing that my answer is not authoritative but also not an entirely terrible "guess".

[MasterKale]

Thumbs down is a bit aggressive, I agree, I just didn't have time to properly respond. We can't talk about what PXP is just yet, but suffice to say it's nothing disruptive to the status quo and has nothing to do with Bluetooth proximity profiles.