* Backport "Allow WASI to open directories without O_DIRECTORY" (#6163)
The `O_DIRECTORY` flag is a request that open should fail if the named
path is not a directory. Opening a path which turns out to be a
directory is not supposed to fail if this flag is not specified.
However, wasi-common required callers to use it when opening
directories.
With this PR, we always open the path the same way whether or not the
`O_DIRECTORY` flag is specified. However, after opening it, we `stat` it
to check whether it turned out to be a directory, and determine which
operations the file descriptor should support accordingly. In addition,
we explicitly check whether the precondition defined by `O_DIRECTORY` is
satisfied.
On Windows, when opening a path which might be a directory using
`CreateFile`, cap-primitives also removes the `FILE_SHARE_DELETE` mode.
That means that if we implement WASI's `path_open` such that it always
uses `CreateFile` on Windows, for both files and directories, then
holding an open file handle prevents deletion of that file.
* Update RELEASES.md
Jamey Sharp
b4bbef2503