[BUGFIX] config.locale_all should format floating point values

The bug with LC_NUMERIC existed in PHP 4.2.3 but is fixed since at least
PHP 5.1.6. The patch uses LC_ALL now.

Change-Id: I08c1600b05ad858d67d2a2e23fd3c0332000527d
Releases: master, 7.6
Resolves: #75141
Reviewed-on: https://review.typo3.org/47455


Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>