gsoc2023: net: http: server can be shut down

[Emna-Rekik]

Server can be shut down

To shut down the server we just need to type quit into the shell.
The application runs in an infinite loop where it continuously checks whether the semaphore has been released. If it has, the loop breaks, and the program ends.

This is how the output is expected to appear:

uart:~$ quit
uart:~$ Shutting down...
exit

Initially, we used this approach, but later, we integrated an eventfd file descriptor into our set of poll file descriptors. By writing to this eventfd, we could trigger an event to break the main loop, allowing us to shut down the server.