Convert pnfs-scsi-server to ReST and move it to admin-guide. Content
remains mostly unchanged.
Signed-off-by: NDaniel W. S. Almeida <dwlsalmeida@gmail.com>
Link: https://lore.kernel.org/r/5c4b8af41ca0a427a3987535815bccf47a65d320.1578697871.git.dwlsalmeida@gmail.comSigned-off-by: NJonathan Corbet <corbet@lwn.net>