smaller delay in proxy streamer

smaller delay in proxy streamer

A one second delay made it seem really choppy and slow when the special
remote was sending content fairly steadily but was bottlenecked on
running gpg on 10 mb chunks.

This does not appreciably increase CPU, although of course if the
special remote is very slow it will add up over time.

It would perhaps be better to use inotify, like tailVerify does.