Spec should mention risk of "hl" colliding with an existing query or fragment parameter

[kimdhamilton]

Per discussion on the mailing list, the spec should mention that one of the drawbacks of using a hashlink as a query parameter or a fragment identifier is the risk of "hl" colliding with an existing parameter.

[BigBlueHat]

Browsers (at least) now support "fragment directives"--see the following from MDN on text fragments:

:~:
Otherwise known as the fragment directive, this sequence of characters tells the browser that what comes next is one or more user-agent instructions, which are stripped from the URL during loading so that author scripts cannot directly interact with them. User-agent instructions are also called directives.

Perhaps that approach could be explored instead--as this would be a "user-agent instruction" by definition...even if the user-agent is curl and bash. 😃