fnichol/knife-server — pull request #47 by dldinternet (2014-01-21 16:12:22+00:00)
Title: Do not blindly transfer options that have not been provided i.e. is nil

The ec2 bootstrap routine sets options on the plugin that have not been provided on the command line i.e. are nil.
This change avoids that so that the plugin runs ONLY with the actual options provided or which have good defaults.