Bump redis-rb to 3.3.1

Makefile

-REDIS_RB_VERSION=v3.3.0
+REDIS_RB_VERSION=v3.3.1
 REDIS_RB_VENDOR_DIR=lib/vendor/redis
 PWD=`pwd`

lib/vendor/redis/lib/redis/connection/ruby.rb

@@ -10,6 +10,16 @@ rescue LoadError
   # Not all systems have OpenSSL support
 end
+if RUBY_VERSION < "1.9.3"
+  class String
+    # Ruby 1.8.7 does not have byteslice, but it handles encodings differently anyway.
+    # We can simply slice the string, which is a byte array there.
+    def byteslice(*args)
+      slice(*args)
+    end
+  end
+end
+
 class Redis
   module Connection
     module SocketMixin
@@ -80,9 +90,34 @@ class Redis
         raise Errno::ECONNRESET
       end
-      # UNIXSocket and TCPSocket don't support write timeouts
-      def write(*args)
-        Timeout.timeout(@write_timeout, TimeoutError) { super }
+      def _write_to_socket(data)
+        begin
+          write_nonblock(data)
+
+        rescue *NBIO_EXCEPTIONS
+          if IO.select(nil, [self], nil, @write_timeout)
+            retry
+          else
+            raise Redis::TimeoutError
+          end
+        end
+
+      rescue EOFError
+        raise Errno::ECONNRESET
+      end
+
+      def write(data)
+        return super(data) unless @write_timeout
+
+        length = data.bytesize
+        total_count = 0
+        loop do
+          count = _write_to_socket(data)
+
+          total_count += count
+          return total_count if total_count >= length
+          data = data.byteslice(count..-1)
+        end
       end
     end

lib/vendor/redis/lib/redis/version.rb

 class Redis
-  VERSION = "3.3.0"
+  VERSION = "3.3.1"
 end