docker: Updated UPGRADE notes

docker/Pkgfile

@@ -7,7 +7,7 @@
 name=docker
 version=1.5.0
 revision=a8a31eff10
-release=2
+release=3
 source=(
     https://raw.githubusercontent.com/docker/docker/v${version}/contrib/check-config.sh
     https://github.com/docker/docker/archive/v$version.tar.gz

docker/UPGRADE

@@ -11,9 +11,8 @@ are **required**:
 - ``CONFIG_CGROUP_FREEZER=y``
 - ``CONFIG_CPUSETS=y``
 - ``CONFIG_CGROUP_PERF=y``
+- ``CONFIG_POSIX_MQUEUE=y``
 
 Please make sure when you're upgrading your Docker engine
 that you ensure these new Kernel configuration options
 are enabled.
-
-.. seealso:: https://gist.github.com/therealprologic/3aa83f811576933cd214