Imported Upstream version 2.8.13
Merge tag 'upstream/2.8.13'

Upstream version 2.8.13

* tag 'upstream/2.8.13':
  Imported Upstream version 2.8.13
New upstream release.
Synchronise ./debian/redis.conf with ./redis.conf.
Update 03-use-system-jemalloc.diff.
Fix FTBFS under kfreebsd (Closes: #754634)

Signed-off-by: Chris Lamb <lamby@debian.org>
releasing version 2:2.8.13-1