[BUGFIX] #53920
Honeypot field validation

Resolves: #53920
Releases: 6.1, 4.7, 4.5
Change-Id: I22ff0c32e56114b0e3198ed67b61d5dc43c5189a
Reviewed-on: https://review.typo3.org/29046
Reviewed-by: Ralf Zimmermann
Tested-by: Ralf Zimmermann