fixed .dsp names
also, no need of working directory
Merge pull request #79 from rjmacready/fix-http-server-demo

fixed .dsp names
Actually, we really need to specify --working-directory, if we call the binary outside the working directory with /dsp
Merge pull request #80 from rjmacready/fix-http-server-demo

Actually, we really need to specify --working-directory, if we call the ...
[server] Clean up shutdown code, including race condition in
join-listeners and use close(sock, abort?: #t) rather than trying to
connect to listeners.