[!!!][TASK] Move pages.url_scheme to compatibility7

Adding SSL support on a per-page basis is something that
does not happen very much in 2017 anymore, rather doing this
on a per-domain basis, and based on server-redirects makes
more sense these days.

The field and the functionality for links is moved to
EXT:compatibility7.

Resolves: #79302
Releases: master
Change-Id: I7ae1c59533bee1d015b39811f39d590e5488aabe
Reviewed-on: https://review.typo3.org/51077


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>