Enable linking to any record by migrating the code of
EXT:linkhandler into the core.

Resolves: #66373
Resolves: #66374
Releases: master
Change-Id: I749103e201d387ae826575c6acb3cdcdf639e966
Reviewed-on: https://review.typo3.org/51526


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>