misc/mc: update Midnight Commander to version 4.8.27, but not only

• Don't try to patch up unsupported compiler warning options and fix the configure script detection logic instead (it correctly passes -Werror in Clang's case, but assumes that $CC is literally called `clang' which is, of course, wrong on both FreeBSD and in general)
• Keep the UNRAR_VERSION adjustment for now: even though it had been fixed upstream, with version 7 it would brake again
• Expand the creator line in the Makefile to include Torsten's full name, with his permission. We have other people named Torsten in the project these days, and this change makes it less confusing

PR: 253796, 257888