class Server

Requests the exception handler to send a signal indicating the server is

active and able to respond to requests.

It's recommended clients call IsActive and wait for a response before

sending an exception to the server with OnException because a

zx.Handle:EXCEPTION can't be released by the client once it's sent

across the channel.

Note: a response guarantees the server was active when it sent the

response, but doesn't preclcude the server being unresponsive after the

reply was sent.

This exception mirrors closely the information provided by exception

channels. The design is to have clients of this API behave as closely as

possible to native exception handlers that are listening to an exception

channel.

`exception` is an exception handle, which controls the exception's

lifetime. See exception zircon docs for more information.

`info` represents basic exception information as provided by the

exception channel.

|bind_handler| returns a handler that binds incoming connections to this

server implementation.

The returned handler borrows the server instance.

The server must outlive the provided |dispatcher|. Only after

the dispatcher is shutdown will it be safe to destroy the servers.

The server should not be moved.