Running noipupdater.sh as service on MacOS

This entry is the corresponding one to the adaption of the noipupdate.sh Script, where the necessary changes for MacOS bash are filed.

Dynamic DNS: adapting noipupdater.sh for MacOS

I often use my MacOS 10.8 laptop as a test server. In order to do this and to have other people easily accessing test services, I use a free Dynamic DNS entry from noip.com.