Move ErrorList to util
Use '=' for flags or else parsing gets confused sometimes
Better handling of unbound pods.

A small collection of tweaks to better handle pods when they are not currently
bound to a host.
Add a util/exec interface for testing execs.
Add a pkg for iptables support

This makes iptables an injectable dependency.  The test for this started off
simple, but got a bit out of hand.  It's starting to become a mocking
framework.
Add a flag-compatible wrapper for net.IPNet
Core support for ip-per-service
Print portal IP in kubecfg
Add and update docs.