*** Submitted as
https://code.google.com/p/go/source/detail?r=21d62bd46e78 ***
net/rpc: document that Register logs to standard error
Also fix spurious & in example.
Fixes issue 4349.
Fixes issue 4489.
R=golang-dev, adg
CC=golang-dev
https://codereview.appspot.com/6905058
https://codereview.appspot.com/6905058/
