netcat6 1.0 - an IPv6 network swiss-army knife

Closes Homebrew/homebrew#25916.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/netcat6.rb

@@ -0,0 +1,63 @@
+require "formula"
+
+class Netcat6 < Formula
+  homepage "http://www.deepspace6.net/projects/netcat6.html"
+  url "http://ftp.debian.org/debian/pool/main/n/nc6/nc6_1.0.orig.tar.gz"
+  sha1 "50b1a3f7bfa610a2016727e5741791ad3a88bd07"
+
+  patch :p0, :DATA
+
+  def install
+    system "./configure", "--disable-dependency-tracking",
+                          "--prefix=#{prefix}",
+                          "--mandir=#{man}"
+    system "make", "install"
+  end
+
+  test do
+    # before we do anything too serious, let's just make sure that --version works
+    IO.popen("#{bin}/nc6 --version") { |subp|
+      assert subp.readline.strip == "nc6 version #{version}"
+    }
+  end
+end
+
+__END__
+# wrap socket-type warnings in very_verbose_mode()
+--- src/network.c	2006-01-19 14:46:23.000000000 -0800
++++ src/network.c.new	2014-01-17 11:02:10.000000000 -0800
+@@ -21,10 +21,11 @@
+  */
+ #include "system.h"
+ #include "network.h"
+ #include "connection.h"
+ #include "afindep.h"
++#include "parser.h"
+ #ifdef ENABLE_BLUEZ
+ #include "bluez.h"
+ #endif/*ENABLE_BLUEZ*/
+
+ #include <assert.h>
+@@ -290,17 +291,20 @@
+	assert(sock >= 0);
+
+	/* announce the socket in very verbose mode */
+	switch (socktype) {
+	case SOCK_STREAM:
+-		warning(_("using stream socket"));
++		if (very_verbose_mode())
++			warning(_("using stream socket"));
+		break;
+	case SOCK_DGRAM:
+-		warning(_("using datagram socket"));
++		if (very_verbose_mode())
++			warning(_("using datagram socket"));
+		break;
+	case SOCK_SEQPACKET:
+-		warning(_("using seqpacket socket"));
++		if (very_verbose_mode())
++			warning(_("using seqpacket socket"));
+		break;
+	default:
+		fatal_internal("unsupported socket type %d", socktype);
+	}