Add support for host-local endpoints

[fundthmcalculus]

Objective

• Allow services running on locahost to be mapped via their cluster routes http://servicename:serviceport vs localhost:port so that a dedicated local configuration is not required
• Argument example: kubefwed svc -n dev --host-local runlocal-service

Process

• Added command line flag --host-local (explicitly not localhost to reduce confusion) which allows the user to specify which services are being run locally
• For the host-local services, the IP is forced to 127.0.0.1 (localhost) explicitly, port mapping doesn't apply.
• The listener is disabled for these ports to prevent port reservation conflicts with the local service.
• Addressed a couple random spelling & punctuation comments.

Open Questions

• Should this support local port mapping via the -r 8443:443 flag?
• Should this ignore the Dial test because the locally running service listening on the port is fine?
• Should this support the configuration file?