* External IP Address Updater

** Overview

Configuration files will be created at:

    /etc/external_ip_updater

Put your domain and DDNS (Dynamic DNS) update urls in 'urls.yaml'.
You can also set the refresh period to check for external ip address
changes.  If there is a change, a call is made to the DDNS update url
provided. 

** Logging

Log file is specified in:

    /etc/external_ip_updater/config.conf

You can adjust the log levels between 'debug' and 'info', typically
when all is running well, just leave it at 'info' only.

** Sample systemd scripts

