redis: v↑ (2.8.23)

- update Redis software to latest upstream in 2.8.* series (which now
  supports IPv6 out of the box);

- update Redis instance template to the one from 2.8.23 and re-merge our
  templating changes to it (file/dir locations, port and binding, master
  password).

  The whole diff to pristine 2.8.23 redis conf is now this:

  diff --git a/.../redis-2.8.23/redis.conf b/slapos/recipe/redis/template/redis.conf.in
  index 870959f..2895539 100644
  --- a/.../redis-2.8.23/redis.conf
  +++ b/slapos/recipe/redis/template/redis.conf.in
  @@ -46 +46 @@ daemonize no
  -pidfile /var/run/redis.pid
  +pidfile %(pid_file)s
  @@ -50 +50 @@ pidfile /var/run/redis.pid
  -port 6379
  +port %(port)s
  @@ -69,0 +70 @@ tcp-backlog 511
  +bind %(ipv6)s
  @@ -108 +109 @@ loglevel notice
  -logfile ""
  +logfile %(log_file)s
  @@ -174 +175 @@ rdbcompression yes
  -# hit to pay (around 10%) when saving and loading RDB files, so you can disable it
  +# hit to pay (around 10%%) when saving and loading RDB files, so you can disable it
  @@ -192 +193 @@ dbfilename dump.rdb
  -dir ./
  +dir %(server_dir)s
  @@ -217 +218 @@ dir ./
  -# masterauth <master-password>
  +%(master_passwd)s

NOTE There are test failures for almost all Redis versions when machine
have not small amount of CPUs:

    https://github.com/antirez/redis/issues/2715#issuecomment-151608948

Because the failure is in replication test, and so far we do not use
replication, and there is no feedback from upstream author to handle
this (for 7 days for my detailed report, and for ~ 3 months for this
issue in general), we can just disable replication test as a temporary
solution.  ( to handle remote patches with md5 hash easily the building
recipe is changed to slapos.recipe.cmmi )

NOTE Redis updated to 2.8 version because GitLab uses this series.
If/when we need more recent one we can add [redis30] in addition to
[redis28].

/reviewed-by @kazuhiko  (on !27 and on !26)
/cc @alain.takoudjou, @jerome

component/redis/0001-tests-Disable-replication-psync-for-now.patch

+From 4e23f7038ae9bdffeab84f1abb5aaf9552ab580e Mon Sep 17 00:00:00 2001
+From: Kirill Smelkov <kirr@nexedi.com>
+Date: Mon, 2 Nov 2015 20:22:33 +0300
+Subject: [PATCH] tests: Disable replication-psync for now
+
+This tests fails on multi-cpu machine for almost all know Redis version.
+A lot of people reported to upstream author and I too provided detailed
+feedback about how it fails and on which hardware and offered ssh access
+to debug:
+
+https://github.com/antirez/redis/issues/2715#issuecomment-151608948
+
+The issue there is already known for ~ 3 months with several people
+allowing to help, but so far it remains broken.
+
+Since we don't use Redis replication, for us it is ok to disable the
+test and move on.
+
+NOTE comments in tcl don't work inside lists (consruct inside { ... } )-
+that's why the entry was moved out.
+---
+ tests/test_helper.tcl | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/tests/test_helper.tcl b/tests/test_helper.tcl
+index d1ebde1..72e7022 100644
+--- a/tests/test_helper.tcl
++++ b/tests/test_helper.tcl
+@@ -11,6 +11,9 @@ source tests/support/tmpfile.tcl
+ source tests/support/test.tcl
+ source tests/support/util.tcl
+ 
++# fails on multi-cpu machines
++# https://github.com/antirez/redis/issues/2715#issuecomment-151608948
++#   integration/replication-psync
+ set ::all_tests {
+     unit/printver
+     unit/auth
+@@ -33,7 +36,6 @@ set ::all_tests {
+     integration/replication-2
+     integration/replication-3
+     integration/replication-4
+-    integration/replication-psync
+     integration/aof
+     integration/rdb
+     integration/convert-zipmap-hash-on-load
+-- 
+2.6.2.521.g3f87150
+

component/redis/buildout.cfg

@@ -6,9 +6,12 @@ parts =
 extends = ../tcl/buildout.cfg
 
 [redis]
-recipe = hexagonit.recipe.cmmi
-url = https://github.com/geoffgarside/redis/archive/ipv6.tar.gz
-md5sum = 0eb594bd4e8ee746a0e2ef67b28cb5d8
+<= redis28
+
+[redis28]
+recipe = slapos.recipe.cmmi
+url = http://download.redis.io/releases/redis-2.8.23.tar.gz
+md5sum = ac7f43f845d0eedb8ae3e5e217b34c61
 configure-command = true
 prefix = 
 make-options =
@@ -19,3 +22,6 @@ make-targets =
   test
 environment =
   PATH=${tcl:location}/bin:%(PATH)s
+patch-options = -p1
+patches =
+  ${:_profile_base_location_}/0001-tests-Disable-replication-psync-for-now.patch#1ed899443ed70fce02d9b95f5e7ca046