Clean up command-line argument used to disable re-download of image bits down to the upgrade server. This is now handed via a much more concise "--no_copy_archive" argument. and user output output "fast restart" messages
Output information on how to run the "image_to_live.sh" client unconditionally (even if a client isn't being launched by this instance).
BUG=none
TEST=Reran commands, observed output
Review URL: http://codereview.chromium.org/2919009
cros_copy_upgrade_server had a bug where it would always start servers
on port 8081 regrdless of whether that port was free. This was a bug
in the "get next free port" code.
BUG=chromium-os:4776
TEST=Reran multiple instances at once, run netstat -nlt
Review URL: http://codereview.chromium.org/2975006
