[TASK] Increase size of domain name field

Allow 255 chars for a domain to be in sync with RFC 1035.

Resolves: #82515
Releases: master, 8.7, 7.6
Change-Id: I63916cb115b00e50c62c1926cf890e29bf89de77
Reviewed-on: https://review.typo3.org/54186


Reviewed-by: Patrik Karisch <p.karisch@pixelart.at>
Tested-by: Patrik Karisch <p.karisch@pixelart.at>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Tested-by: Alexander Schnitzler <review.typo3.org@alexanderschnitzler.de>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>