change permissions on config file to allow Redis to config rewrite it
remove config value that became obsolete in Redis 2.8
Revert "fix permissions issue on /var/log/redis which was causing the service not to start properly"
After having discussed this with the owner of the origin repo, I am convinced that it is the responsibility of the Redis installer to set up this directory.

This reverts commit 0b431cd95a16b13bbdac434ace353cd52c0ef292.
temporary workaround for a bug in librarian-puppet

Here is the librarian-puppet issue:
https://github.com/rodjek/librarian-puppet/pull/94
Merge pull request #1 from opentable/EnableRedis-2_8

enable installation of redis 2.8