[dpdk-stable] [PATCH stable master] README: indicate master branch is not used

[Kevin Traynor <ktraynor@redhat.com>]

There has been a commit history on the dpdk-stable repo
master branch even though it is not actively used or really
defined what should be there. This is the default branch when
cloning the repo so it can be confusing.

Drop all history on dpdk-stable repo master branch back to the
initial commit and add to the existing README blurb that
stable/LTS branches should be used.

Signed-off-by: Kevin Traynor <ktraynor@redhat.com>

---
Note, this is intended to be in conjunction with 'git reset --hard'
to the initial DPDK commit on the dpdk-stable repo master branch.
---
 README | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 README

diff --git a/README b/README
new file mode 100644
index 0000000000..7defb70606
--- /dev/null
+++ b/README
@@ -0,0 +1,21 @@
+DPDK is a set of libraries and drivers for fast packet processing.
+It supports many processor architectures and both FreeBSD and Linux.
+
+The DPDK uses the Open Source BSD-3-Clause license for the core libraries
+and drivers. The kernel components are GPL-2.0 licensed.
+
+Please check the doc directory for release notes,
+API documentation, and sample application information.
+
+For questions and usage discussions, subscribe to: users@dpdk.org
+Report bugs and issues to the development mailing list: dev@dpdk.org
+
+This is the master branch of the dpdk-stable repo. It is unused.
+
+Please switch branch to one of the stable/LTS branches.
+
+Details of currently maintained stable/LTS branches are available at:
+https://core.dpdk.org/roadmap/#stable
+
+Releases from current and previously maintained stable/LTS branches
+are available via git tags or at: https://core.dpdk.org/download/
-- 
2.21.1