Switch HTTP server to HTTP 1.1

[vinc]

• Respond with HTTP/1.1 instead of HTTP/1.0
• Respond with Connection: keep-alive instead of Connection: close
• Add packet capture to QEMU

https://www.rfc-editor.org/rfc/rfc2616#page-44

[vinc]

Testing HTTP keep-alive:

$ curl -v -L http://localhost:8080/tmp
*   Trying 127.0.0.1:8080...
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /tmp HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.84.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 301 Moved Permanently
< Connection: keep-alive
< Content-Length: 28
< Content-Type: text/html; charset=utf-8
< Date: Thu, 25 Aug 2022 18:53:21 GMT
< Location: /tmp/
< Server: MOROS/0.8.0
<
* Ignoring the response-body
* Connection #0 to host localhost left intact
* Issue another request to this URL: 'http://localhost:8080/tmp/'
* Found bundle for host: 0x557f72d24af0 [serially]
* Can not multiplex, even if we wanted to
* Re-using existing connection #0 with host localhost
* Connected to localhost (127.0.0.1) port 8080 (#0)
> GET /tmp/ HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.84.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Connection: keep-alive
< Content-Length: 251
< Content-Type: text/html; charset=utf-8
< Date: Thu, 25 Aug 2022 18:53:21 GMT
< Server: MOROS/0.8.0
<
<h1>Index of /tmp/</h1>
<li><a href="/tmp/alice.txt">alice.txt</a></li>
<li><a href="/tmp/beep">beep</a></li>
<li><a href="/tmp/hello.txt">hello.txt</a></li>
<li><a href="/tmp/lisp">lisp</a></li>
<li><a href="/tmp/machines.txt">machines.txt</a></li>
* Connection #0 to host localhost left intact