[BUGFIX] Allow multiline strings in foreign_table_where

Add the ’s’ (PCRE_DOTALL) modifier to regular expressions.

Resolves: #82854
Releases: master, 8.7
Change-Id: Ib5feaba0272e45dce1bc0b4cfedb11f5eb0b10c2
Reviewed-on: https://review.typo3.org/54474


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>