$_SERVER is not available from CLI

I am working on a WP_CLI command and noticed that JetPack is relying on $_SERVER throughout the code. Since this info is not available from CLI, I am getting a bunch of Undefined index notices.

What is the preferred method for submitting a patch/pull-request for Jetpack? Or do you guys want to just take this one. Could almost search for $_SERVER and replace with an isset, but you may want to be a little smarter in a few places.

Anyway, let me know if I can help.

http://wordpress.org/extend/plugins/jetpack/