upgrade to librdkafka 0.8.6

R. Tyler's patches are included in librdkafka 0.8.6

ext/hermann/extconf.rb

@@ -122,10 +122,9 @@ class RdKafkaRecipe < MiniPortile
 end
 ################################################################################
 
-librdkafka = RdKafkaRecipe.new('librdkafka', '0.8.4')
+librdkafka = RdKafkaRecipe.new('librdkafka', '0.8.6')
 librdkafka.files = ["https://github.com/edenhill/librdkafka/archive/#{librdkafka.version}.tar.gz"]
-librdkafka.checksum = '28a3252fd0f31d4a38bea9cd25083a06'
-librdkafka.patch_files = Dir["#{File.join(BASE_DIR, 'ext', 'patches', 'librdkafka')}/*.patch"]
+librdkafka.checksum = '1b77543f9be82d3f700c0ef98f494990'
 checkpoint = ".librdkafka.#{librdkafka.version}.cooked"
 
 unless File.exists?(checkpoint)

ext/patches/librdkafka/0006-Update-some-headers-to-include-the-right-headers-to-.patch

@@ -1,57 +0,0 @@
-From 888ca33b571d99e877d665235b822f7c961c8fdb Mon Sep 17 00:00:00 2001
-From: "R. Tyler Croy" <tyler@monkeypox.org>
-Date: Thu, 28 Aug 2014 16:24:04 -0700
-Subject: [PATCH 6/8] Update some headers to include the right headers to build
- on FreeBSD
-
----
- src/rd.h     | 9 +++++++++
- src/rdaddr.h | 4 ++++
- 2 files changed, 13 insertions(+)
-
-diff --git a/src/rd.h b/src/rd.h
-index c31501e..4789493 100644
---- a/src/rd.h
-+++ b/src/rd.h
-@@ -37,7 +37,11 @@
- #include <errno.h>
- #include <time.h>
- #include <sys/time.h>
-+
-+#ifndef __FreeBSD__
-+/* alloca(3) is in stdlib on FreeBSD */
- #include <alloca.h>
-+#endif
- #include <assert.h>
- #include <pthread.h>
- 
-@@ -110,6 +114,11 @@
- # endif
- #endif /* sun */
- 
-+#ifdef __FreeBSD__
-+/* FreeBSD defines be64toh() in sys/endian.h */
-+#include <sys/endian.h>
-+#endif
-+
- #ifndef be64toh
- #ifndef __APPLE__
- #ifndef sun
-diff --git a/src/rdaddr.h b/src/rdaddr.h
-index 0b37354..e55bd55 100644
---- a/src/rdaddr.h
-+++ b/src/rdaddr.h
-@@ -32,6 +32,10 @@
- #include <arpa/inet.h>
- #include <netdb.h>
- 
-+#ifdef __FreeBSD__
-+#include <sys/socket.h>
-+#endif
-+
- /**
-  * rd_sockaddr_inx_t is a union for either ipv4 or ipv6 sockaddrs.
-  * It provides conveniant abstraction of AF_INET* agnostic operations.
--- 
-1.9.0
-