Add unix server

Based on celluloid#123, which hasn't been
merged yet.

lib/reel.rb

@@ -14,6 +14,7 @@
 require 'reel/server'
 require 'reel/server/http'
 require 'reel/server/https'
+require 'reel/server/unix'
 
 require 'reel/websocket'
 require 'reel/stream'

lib/reel/server/unix.rb

@@ -0,0 +1,18 @@
+module Reel
+  class Server
+    class UNIX < Server
+
+      # Create a new Reel HTTPS server
+      #
+      # @option options [String] socket path to bind to
+      # @option options [Fixnum] backlog of requests to accept
+      #
+      # @return [Reel::Server::UNIX] Reel UNIX server actor
+      def initialize(socket_path, options={}, &callback)
+        server = Celluloid::IO::UNIXServer.new(socket_path)
+        options[:socket_path] = socket_path
+        super(server, options, &callback)
+      end
+    end
+  end
+end