This is from the upstream library commit id 3326535126e435f1ba647885ce43a8f0f3d317eb, corresponding to Chromium 88.0.4290.1.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Expands on instructions for updating the code when upstream changes. Also renaming with the '.md' extension for things that understand Markdown.