fix dummy sever for example validation

Review 639 by @neumino
Closes #1020

docs/rql/scripts/validate_examples.py

@@ -50,7 +50,7 @@ def validate_for(lang, port):
 $LOAD_PATH.unshift('../../drivers/ruby/lib')
 require 'rethinkdb.rb'
 include RethinkDB::Shortcuts
-conn = r.connect('localhost', %d)
+conn = r.connect('host' => :localhost, :port => %d)
 puts 'Running Ruby validation.'
 """ % port)
 
@@ -125,6 +125,10 @@ def validate_for(lang, port):
 class BlackHoleRDBHandler(SocketServer.BaseRequestHandler):
     def handle(self):
         magic = self.request.recv(4)
+        (length,) = struct.unpack("<L",self.request.recv(4))
+        if length != 0:
+            self.request.recv(length)
+        self.request.sendall("SUCCESS\0")
 
         while (True):
             header = self.request.recv(4)