RFC: Demonstration of http2-jetty, http3-jetty & http2-robaho

[mechite]

@SentryMan
Related-to: #46
Signed-off-by: Mahied Maruf contact@mechite.com

[mechite]

If in the Jetty one, we don't use JettyHttpServerProvider.setServer, and instead make
our own provider, we could completely evade static configuration, meaning one can
have two Jetty servers running using Jex, with independent configuration

This seems trivial to do

^{EDIT — I will probably work on this more later, but I'm quite busy ATM}

[SentryMan]

yeah the jetty spi is nonfunctional with http2/http3 atm

[mechite]

@SentryMan what kind of test do we even write here?

• The robaho one:
  • sets the http2 system prop
  • sets Jex serverProvider to robaho.net.httpserver.DefaultHttpServerProvider
• The jetty ones:
  • configure JettyHttpServerProvider for http2 and http3 respectively
  • set Jex serverProvider to it

if you have any idea feel free to put a trivial test even if it fails
I'll take a look later

[SentryMan]

the robaho one is so simple I don't think we need a test, for jetty, what's needed is to make even a basic get call