The method GeneralUtility::getUrl() is used a lot in the
core where only local files are allowed.

Most occurrences can be replaced by using the native
file_get_contents() PHP function.

file_get_contents() is now always used when

* is_file() is called
* only local paths (e.g. prefixed with PATH_site)
* absolute paths (GeneralUtility::getFileAbsFileName)
* ensured that files within extensions

are checked before. In these cases getUrl() MUST NOT BE
USED but built-in file_get_contents() must be used instead.

Resolves: #75178
Releases: master
Change-Id: Ia88879d8fa44fd88e604b3332c1a710c33e5d3ec
Reviewed-on: https://review.typo3.org/47309


Reviewed-by: Philipp Gampe <philipp.gampe@typo3.org>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Daniel Gorges <daniel.gorges@b13.de>
Tested-by: Daniel Gorges <daniel.gorges@b13.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>