New Feature: Function Dialers and Endpoints

[fortuna]

We added new adaptors that can turn a function into an Endpoint or Dialer:

• FuncStreamEndpoint, FuncPacketEndpoint
• FuncStreamDialer, FuncPacketDialer

That allows you to create Endpoints and Dialers without having to define a new type. For example, a StreamDialerEndpoint could be defined as:

endpoint := transport.FuncStreamEndpoint(func(ctx context.Context) (transport.StreamConn, error) {
	return dialer.Dial(ctx, address)
})