validns 0.8 (new formula)

Closes Homebrew/homebrew#39843.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/validns.rb

@@ -0,0 +1,19 @@
+class Validns < Formula
+  homepage "http://www.validns.net/"
+  url "http://www.validns.net/download/validns-0.8.tar.gz"
+  sha256 "df2db0eaa998a0411ff4c1c4e417eb82d32aec4835f92f45f26c66c8d1d5bd22"
+
+  depends_on "judy"
+  depends_on "openssl"
+
+  def install
+    system "make"
+    bin.install "validns"
+    man1.install "validns.1"
+  end
+
+  test do
+    (testpath/"example.com").write("example.com. IN SOA ns.example.com. hostmaster.example.com. 9 10800 3600 604800 3600")
+    assert_match /ttl not specified and default is not known/, shell_output("#{bin}/validns example.com 2>&1", 1)
+  end
+end