Merge pull request fwaeytens#4 from srcq/master

Fix the previous diff for the case when the answer is a CNAME

Update dnsenum.pl

- version number was stated incorrectly vs release 1.2.4

Merge pull request fwaeytens#2 from DannyCork/master

did this commit with my github username to get the commit associated correctly.

Create INSTALL.txt

Installation help

Create INSTALL.txt

Installation help