[FEATURE REQUEST] ( Keep-Alive support in HTTP server )

[rockyzhengwu]

Is your feature request related to a problem? Please describe.

I developed a restful server with pistache, this server just use inside the company, if client and server use persistent connectioin will be more efficient .

Describe the solution you'd like

if client add Connection: Keep-alive can reuse socket with a timeout .

Additional Context

HTTP/1.1 support Keep-alive default

[kiplingw]

I think this is a good idea, but probably fairly complicated to implement. PRs welcome.