dnrd: Add new recipe

dnrd is a proxying nameserver. It forwards DNS queries to the appropriate
nameserver, but can also act as the primary nameserver for a subnet behind
a firewall. It also has features such as caching DNS requests, support for
DNS servers, cache poisoning prevention, TCP support, etc.

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>