[TASK] Remove locallang.php handling from Configuration

The locallang.php handling was deprecated
with the introduction of xlf files in TYPO3 CMS 4.6.

However, it is still used as fallback, although
not used in the TYPO3 Core.

For CMS 7, the option is disabled by default
and the needed class is deprecated.

Resolves: #62819
Releases: master
Change-Id: Idc4ee10925c0c4d6480f99e7ed5c40961f621eef
Reviewed-on: http://review.typo3.org/33943
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
[TASK] Render Core changelog as a standard manual

Releases: master
Resolves: #62822
Change-Id: I786d0e5eaa04aa986417721dd0265b7633fb0ca1
Reviewed-on: http://review.typo3.org/33944
Reviewed-by: Benjamin Mack <benni@typo3.org>
Tested-by: Benjamin Mack <benni@typo3.org>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>