redis: run redis as user redis. fixes #2452.

srcpkgs/redis/files/redis/run

@@ -7,4 +7,4 @@ if [ ! -d /run/redis ]; then
 	mkdir -m0750 -p /run/redis
 fi
 chown redis:redis /run/redis
-exec redis-server /etc/redis/redis.conf
+exec chpst -u redis:redis redis-server /etc/redis/redis.conf

srcpkgs/redis/template

@@ -1,7 +1,7 @@
 # Template file for 'redis'
 pkgname=redis
 version=3.0.3
-revision=3
+revision=4
 makedepends="jemalloc-devel"
 homepage="http://redis.io"
 distfiles="http://download.redis.io/releases/${pkgname}-${version}.tar.gz"