customink/rspec-dns — pull request #1 by otahi (2013-08-11 21:56:15+00:00)
Title: Develop accept multi type records

I wanted to do NS record like this.
```ruby
describe 'google.com' do
it { should have_dns.with_type('NS').and_name('ns2.google.com') }
end
```
But I could not.

Not all Resolv resources do not have "type". When type is missing, it occurs errors.
I changed way to distinguish the type.

And except record with address can not be tested if no address record.
I think all record is need to be change to string.

Finally, I added options description. It might be too verbose..