scsi: docs: introduction: Multiple cleanups

Modify URLs to use https instead of http.
Remove ancient URLs that don't work.
Change "scsi" in text to "SCSI".
Change "cdrom" in text to "CD-ROM".
Drop the reference to "autoclean" for modules since I can't
  find it in any current documentation.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230518212749.18266-3-rdunlap@infradead.org


Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>