add cli argument for sslEnabled

Hello @dpup, @huckphin,

Please review the following commits I made in branch 'ddb-add-ssl-enabled-cli-option'.

My wrapper bash script for draining queues is configfile-less. Doesn't look like
we grab this option from the CLI.  I'm not even sure this is necessary, but wanted
to throw this out there.

3a9fe3317b51da14d429b745fd198687c4e423c4 (2014-11-03 12:14:07 -0800)
add cli argument for sslEnabled

R=@dpup
R=@huckphin