httpdiff 1.0.0 (import from head-only)

Closes #4514.

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

Formula/httpdiff.rb

@@ -0,0 +1,18 @@
+class Httpdiff < Formula
+  desc "Compare two HTTP(S) responses"
+  homepage "https://github.com/jgrahamc/httpdiff"
+  url "https://github.com/jgrahamc/httpdiff/archive/v1.0.0.tar.gz"
+  sha256 "b2d3ed4c8a31c0b060c61bd504cff3b67cd23f0da8bde00acd1bfba018830f7f"
+
+  head "https://github.com/jgrahamc/httpdiff.git"
+
+  depends_on "go" => :build
+
+  def install
+    system "go", "build", "-o", bin/"httpdiff"
+  end
+
+  test do
+    system bin/"httpdiff", "http://brew.sh", "http://brew.sh"
+  end
+end