Resolve the volume name before allocating the temporary directory handle used by the AFP Entry ID smoke test.
ncpfs does not block the AFP endpoint. Its ncp_ns_alloc_short_dir_handle() helper sends the namespace-aware handle allocation request using the supplied directory style, volume, directory entry, and path tuple. The ncpfs tests allocate a handle for a volume root with NCP_DIRSTYLE_DIRBASE, a volume number, directory entry 0, and no encoded path, then use that handle with relative paths.
The smoke test was still trying to allocate the handle as a NOHANDLE path using a raw VOL: string. mars_nwe rejects that request before the AFP request is sent, so the test never reaches NCP 0x23/0x0c and no AFP diagnostics appear in the server log.
Look up the volume number with ncp_get_volume_number(), allocate the temporary handle as DIRBASE(volume, 0, NULL), and keep passing only the relative path to AFP Get Entry ID From Path Name.
This changes only the Linux smoke test; server AFP protocol behavior is unchanged.
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