cgroup: rename cgroup documentations

cgroup-legacy may be too loaded.  Rename the docs so that they're
postfixed with v1 and v2.

* s/cgroup-legacy/cgroup-v1/
* s/cgroup.txt/cgroup-v2.txt/

Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/Documentation/cgroup-legacy/00-INDEX b/Documentation/cgroup-v1/00-INDEX
similarity index 100%
rename from Documentation/cgroup-legacy/00-INDEX
rename to Documentation/cgroup-v1/00-INDEX

diff --git a/Documentation/cgroup-legacy/blkio-controller.txt b/Documentation/cgroup-v1/blkio-controller.txt
similarity index 100%
rename from Documentation/cgroup-legacy/blkio-controller.txt
rename to Documentation/cgroup-v1/blkio-controller.txt

diff --git a/Documentation/cgroup-legacy/cgroups.txt b/Documentation/cgroup-v1/cgroups.txt
similarity index 100%
rename from Documentation/cgroup-legacy/cgroups.txt
rename to Documentation/cgroup-v1/cgroups.txt

diff --git a/Documentation/cgroup-legacy/cpuacct.txt b/Documentation/cgroup-v1/cpuacct.txt
similarity index 100%
rename from Documentation/cgroup-legacy/cpuacct.txt
rename to Documentation/cgroup-v1/cpuacct.txt

diff --git a/Documentation/cgroup-legacy/cpusets.txt b/Documentation/cgroup-v1/cpusets.txt
similarity index 100%
rename from Documentation/cgroup-legacy/cpusets.txt
rename to Documentation/cgroup-v1/cpusets.txt

diff --git a/Documentation/cgroup-legacy/devices.txt b/Documentation/cgroup-v1/devices.txt
similarity index 100%
rename from Documentation/cgroup-legacy/devices.txt
rename to Documentation/cgroup-v1/devices.txt

diff --git a/Documentation/cgroup-legacy/freezer-subsystem.txt b/Documentation/cgroup-v1/freezer-subsystem.txt
similarity index 100%
rename from Documentation/cgroup-legacy/freezer-subsystem.txt
rename to Documentation/cgroup-v1/freezer-subsystem.txt

diff --git a/Documentation/cgroup-legacy/hugetlb.txt b/Documentation/cgroup-v1/hugetlb.txt
similarity index 100%
rename from Documentation/cgroup-legacy/hugetlb.txt
rename to Documentation/cgroup-v1/hugetlb.txt

diff --git a/Documentation/cgroup-legacy/memcg_test.txt b/Documentation/cgroup-v1/memcg_test.txt
similarity index 100%
rename from Documentation/cgroup-legacy/memcg_test.txt
rename to Documentation/cgroup-v1/memcg_test.txt

diff --git a/Documentation/cgroup-legacy/memory.txt b/Documentation/cgroup-v1/memory.txt
similarity index 100%
rename from Documentation/cgroup-legacy/memory.txt
rename to Documentation/cgroup-v1/memory.txt

diff --git a/Documentation/cgroup-legacy/net_cls.txt b/Documentation/cgroup-v1/net_cls.txt
similarity index 100%
rename from Documentation/cgroup-legacy/net_cls.txt
rename to Documentation/cgroup-v1/net_cls.txt

diff --git a/Documentation/cgroup-legacy/net_prio.txt b/Documentation/cgroup-v1/net_prio.txt
similarity index 100%
rename from Documentation/cgroup-legacy/net_prio.txt
rename to Documentation/cgroup-v1/net_prio.txt

diff --git a/Documentation/cgroup-legacy/pids.txt b/Documentation/cgroup-v1/pids.txt
similarity index 100%
rename from Documentation/cgroup-legacy/pids.txt
rename to Documentation/cgroup-v1/pids.txt

diff --git a/Documentation/cgroup.txt b/Documentation/cgroup-v2.txt
similarity index 100%
rename from Documentation/cgroup.txt
rename to Documentation/cgroup-v2.txt