Change the linuxerr.ErrorFromErrno to return an error type and not
a *errors.Error type. The latter results in problems comparing to nil
as <nil><nil> != <nil><*errors.Error>.
In a follow up, there will be a change to remove *errors.Error.Errno(),
which will also encourage users to not use Errnos to reference linuxerr.
PiperOrigin-RevId: 406444419
Add Equals method to compare syserror and unix.Errno errors to linuxerr errors.
This will facilitate removal of syserror definitions in a followup, and
finding needed conversions from unix.Errno to linuxerr.
PiperOrigin-RevId: 380909667
Change the p9 server to use *errors.Error defined in pkg linuxerr. Done
separate from the client so that we ensure different p9 server/client versions
work with each other.
PiperOrigin-RevId: 380084491
Zach Koopmans