[BUGFIX] Make showAccessRestrictedPages work

This patch fixes a problem where setting showAccessRestrictedPages
setting in HMENU etc. did not result in the correct behavior according
to documentation at https://docs.typo3.org/typo3cms/TyposcriptReference/MenuObjects/CommonProperties/Index.html.

The patch changes the behavior caused by using `NONE` as
keyword in the setting.

Before: using the option renders `<a>Page title</a>` when page is inaccessible.

After: using the option renders `<a href="index.php?id=123">Page title</a>`
when page is not accessible.

Change-Id: I4364f7ec9f44e1e0b70654830efc236f20e6bf30
Resolves: #17904
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/50696


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>