Rev::UNIXServer: use path instead of the first argument

I'm fairly certain the +path+ argument was intended to be used
for binding the UNIXServer.  I don't think this was used by
anything before (and not in any specs) so the bug got hit.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

lib/rev/server.rb

@@ -53,7 +53,7 @@ def initialize(host, port, klass = TCPSocket, *args, &block)
   # creates new connection objects of the given class.
   class UNIXServer < Server
     def initialize(path, klass = UNIXSocket, *args, &block)
-      super(::UNIXServer.new(*args), klass, *args, &block)
+      super(::UNIXServer.new(path), klass, *args, &block)
     end
   end
 end