Max Wipfli 9cc201fb29 Kernel: Ignore null parent custody without error in VFS::open ...

This modifies the error checks in VFS::open after the call to
resolve_path to ignore a null parent custody if there is no error, as
this is expected when the path to resolve points to "/". Rather, a null
parent custody only constitutes an error if it is accompanied by ENOENT.
This behavior is documented in the VFS::resolve_path_without_veil
method.

To accompany this change, the order of the error checks have been
changed to more naturally fit the new logic.

2021-05-19 12:27:25 +02:00

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