[CLEANUP] Remove unnecessary fully qualified names

Remove unnecessary fully qualified names from Utility classes.

Resolves: #62505
Releases: master
Change-Id: I3d4af98670911b3b49bd8043136c92422925cd2a
Reviewed-on: http://review.typo3.org/33588
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
[TASK] Cleanup phpDoc to match CGL

* Use bool in @return
* Use int in @return
* Use bool in @param
* Use int in @param
* Remove extra tabs and spaces in @param

Resolves: #62506
Releases: master
Change-Id: I673888aa08855a1364150d0060d0f205fc1f83a2
Reviewed-on: http://review.typo3.org/33577
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>
[CLEANUP] BackendUtility

Fix various code issues like missing return values, wrong phpdoc, unused
variables, etc.

Resolves: #62414
Releases: master
Change-Id: I1769e9c365b96d70cde426a3d079acf8abbfc724
Reviewed-on: http://review.typo3.org/33480
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Stefan Froemken <froemken@gmail.com>
Tested-by: Stefan Froemken <froemken@gmail.com>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
[BUGFIX] Remove wrong escaping of email sender

Remove a wrong escaping method from sysext form which causes email
problems.

Resolves: #60437
Releases: master, 6.2
Change-Id: I3a5447b55f4f0723637c04929de0412a4a3b67a7
Reviewed-on: http://review.typo3.org/33499
Reviewed-by: Ayke Halder <mail@ayke-halder.de>
Tested-by: Ayke Halder <mail@ayke-halder.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>