Correctly identify utmpx support in FreeBSD.

• FreeBSD's utmpx is incorrectly identified in ./configure.
• Because of the falsely identified utmpx support in the ./configure script, a previously applied patch, which didn't work, is no longer needed.

PR: 241530
Reported by: Henry David Bartholomew <PopularMoment@protonmail.com>

		Daniel Drinnon <ddrinnon@cdor.net>