bug#52477: 27.1; .crx and .crx3 are zip files

[Michael Albinus]

Stefan Kangas <stefan@marxist.se> writes:

Hi,

> Just to add some initial observations:
>
>     $ file 1.0.6.0_aemomkdncapdnfajjbbcbdebjljbpmpj.crx
>     1.0.6.0_aemomkdncapdnfajjbbcbdebjljbpmpj.crx: Google Chrome
> extension, version 3
>
> The first couple of bytes of that files is "Cr24", while a normal zip
> file starts with "PK".

Yes, and that's why libarchive(3) doesn't handle it. Sadly, I cannot add
it to tramp-archive.el, therefore.

But there's no reason to prevent it from adding to arc-mode.el and/or
dired-aux.el.

Best regards, Michael.