Added getShortName() method

[mvdgeijn]

Get only the subdomain from the ResourceRecord object.

Description

Get only the subdomain part from the ResourceRecord object

Motivation and context

This method creates an easy way to get only the subdomain part from the ResourceRecord. Handy in situations where the domain part is obvious or unnecessary.

How has this been tested?

Tested by using it in our project.

Screenshots (if appropriate)

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[trizz]

Hi @mvdgeijn,

Thanks for your contribution! I've just tagged v4.2.0 which contains this feature.