David Gow authored Apr 04, 2022 and Elvis Angelaccio committed May 20, 2022

7zip 21.0 finally provided an official native port of 7zip, and has superseded
the p7zip port in some distros (openSUSE, for instance, no longer packages
p7zip).  The CLI interface between them is almost identical, but Ark doesn't
recognise the different version string, so doesn't work with 7zip (making it
impossible to open 7z archives in Ark on openSUSE).

Update the 7zip CLI plugin to detect both p7zip and 7zip's version lines.