Add nping from the nmap suite - a network diagnostic tool.

packages/nping.rb

+require 'package'
+
+class Nping < Package
+  description 'Nping is part of the nmap suite - a network diagnostics tool`.'
+  homepage 'https://nmap.org/nping/'
+  version '7.60'
+  source_url 'https://nmap.org/dist/nmap-7.60.tar.bz2'
+  source_sha256 'a8796ecc4fa6c38aad6139d9515dc8113023a82e9d787e5a5fb5fa1b05516f21'
+
+  binary_url ({
+    x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/nping-7.60-chromeos-x86_64.tar.xz',
+  })
+  binary_sha256 ({
+    x86_64: '208ed7878333564c9ea15d82174d542ea1c6e5d93b2ef0219000c5b8de695eb2',
+  })
+
+  depends_on 'buildessential' => :build
+  depends_on 'filecmd' => :build   #configure uses file 
+
+  def self.build
+    #fixup "/usr/bin/file" -> "file" in the configure script
+    
+    system "sed -i s#/usr/bin/file##{CREW_PREFIX}/bin/file#g libdnet-stripped/configure"
+
+    #without-zenmap in configure removes openssl dependency
+    system "./configure --without-zenmap --prefix=#{CREW_PREFIX}"
+
+    # Make files in the project dont have the right dependencies to build this by itself
+    # so just make the whole thing and then install nping - not effecient, but
+    # more likely to work than a bunch of Makefile dependency edits
+    system "make"
+  end
+
+  def self.install
+    system "cd nping && make DESTDIR=#{CREW_DEST_DIR} install"
+  end
+end