Add mac_dns script

Author: pmuir

_util/mac_dns.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+for RECORD in "173.222.228.44 developers.redhat.com"; do
+  grep -q "$RECORD" /private/etc/hosts || echo "$RECORD" | sudo tee -a /private/etc/hosts > /dev/null
+done
+