This commit removes the --expose-http2 option. In the code comment it
states that this should should be noop through v9.x, and it sounds like
it can be removed for 10.x and above.

PR-URL: https://github.com/nodejs/node/pull/20887
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

This adds the Http1IncomingMessage and Http1ServerReponse options
to http2.createServer().

PR-URL: https://github.com/nodejs/node/pull/15752
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>