Humanize sleep log message

For better readability I use another action view helper method of Rails.
Also, for experimental reasons I have turned off the timeout cap. I am
not sure, whether my IP gets throttled or if the server is simply under
heavy load. It is hard to decide this remotely. Probably both can always
be the case.

A final solution could be to reduce the timeout again once another
request was successful.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>