Correctly handle -l flag in ekam-client
Correctly handle -l flag in ekam-client

It was impossible to pass a log line limit because -l did not consume
its argument, leading to this:

    $ ekam-client -l 100
    Unknown option: 100

This fixes the behaviour, and additionally checks that the argument in
fact a number.

sandstorm-io/ekam,sandstorm-io/ekam,sandstorm-io/ekam