Update README file for ffoulkes fork (#4)

Signed-off-by: Derek Foster <justffoulkes@gmail.com>

README.md

@@ -2,17 +2,29 @@
 [![Krnlmon CI Pipeline](https://github.com/ipdk-io/krnlmon/actions/workflows/pipeline.yml/badge.svg)](https://github.com/ipdk-io/krnlmon/actions/workflows/pipeline.yml)
 <!-- markdownlint-enable MD041 -->
 
-# ipdk-io/krnlmon
+# ffoulkes/krnlmon
 
 The Kernel Monitor receives RFC 3549 messages from the Linux Kernel over a
 Netlink socket when changes are made to the kernel networking data structures.
 
-## Breaking changes
+## Background
 
-### 11 Oct 2023
+In January 2025, Intel decided to roll the IPDK networking-recipe `main`
+branch and its submodules back to their `mev-ts-1.9` release (Sep 30, 2024),
+effectively discarding the work I had done since then.
+This fork allows me to keep tinkering without stepping on their toes.
+
+## Contents
+
+This repository is a fork of <https://github.com/ipdk-io/krnlmon>.
+It is a submodule of <https://github.com/ffoulkes/networking-recipe>.
+
+Ongoing development is done in the `ffoulkes` branch.
+
+- The `mev-ts-1.9` tag marks the point at which the `ffoulkes` branch
+  diverges from the ipdk-io `main` branch.
+
+- The `v3.2.0.0` tag marks the point at which this repository was forked.
+  It corresponds to
+  [Krnlmon v3.2.0.0](https://github.com/ipdk-io/krnlmon/releases/tag/v3.2.0.0).
 
-- https://github.com/ipdk-io/krnlmon/pull/59: The NextHop table in the P4
-program has been moved from the SEM block (exact match) to the WCM block
-(ternary block). The Kernel Monitor must use a different API to write the
-entry to the WCM block. krnlmon is no longer compatible with older versions
-of the P4 program.