Setup adns on Mac

Package Information:

Name: adns
Use: C/C++ resolver library and DNS resolver utility. adns is a resolver library for C (and C++) programs, and a collection of useful DNS resolver utilities.
URL: http://www.chiark.greenend.org.uk/~ian/adns/

Installation Steps:

1. Open Terminal using Spotlight search by pressing  <command+space>. Type terminal and hit  Enter key.
2. Now, run

   ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

3. Install adns using brew

   brew install adns

adns is ready to use now!