Reply to HTTP requests with error code on failures

[kasperl]

Today, Jaguar doesn't reply with an error to HTTP requests that fail in unexpected ways (exceptions, timeouts, etc.).

We probably need to wrap the HTTP request handling in something that acts on exceptions. It isn't quite clear if the request should be considered handled if we sent the exception back to the user or if we should continue unwinding.

jaguar/src/jaguar.toit

Line 480 in 59aa0fc

server.listen socket:: | request/http.Request writer/http.ResponseWriter |