istream-null: implement method istream.as_fd()
istream-null: implement method istream.as_fd()

Simply call dup(0) to get a read-only handle to /dev/null.

CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy,CM4all/beng-proxy