gdnsd 2.1.0 (new formula)

Closes Homebrew/homebrew#33881.

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

Formula/gdnsd.rb

@@ -0,0 +1,36 @@
+require "formula"
+
+class Gdnsd < Formula
+  homepage "http://gdnsd.org/"
+  url "https://github.com/gdnsd/gdnsd/releases/download/v2.1.0/gdnsd-2.1.0.tar.xz"
+  sha1 "138c7542005de457e756bf84fd7f727d690efe56"
+
+  head do
+    url "https://github.com/gdnsd/gdnsd.git"
+    depends_on :autoconf
+    depends_on :automake
+    depends_on :libtool
+  end
+
+  depends_on "libev"
+  depends_on "ragel"
+  depends_on "libunwind-headers" => :recommended
+
+  def install
+    system "autoreconf", "-fvi" if build.head?
+    system "./configure", "--disable-debug",
+                          "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}",
+                          "--with-rundir=#{var}/run",
+                          "--localstatedir=#{var}",
+                          "--sysconfdir=#{etc}",
+                          "--without-urcu"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"config").write("options => { listen => [ 127.0.0.1 ] }")
+    system "#{sbin}/gdnsd", "-c", testpath, "checkconf"
+  end
+end