[Bug 209990] Kernel configuration NOTES outdated information about COMPAT_43

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209990

            Bug ID: 209990
           Summary: Kernel configuration NOTES outdated information about
                    COMPAT_43
           Product: Base System
           Version: 10.3-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: conf
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: simplerezo at gmail.com

In NOTES file, section "COMPATIBILITY OPTIONS":

#
# Implement system calls compatible with 4.3BSD and older versions of
# FreeBSD.  You probably do NOT want to remove this as much current code
# still relies on the 4.3 emulation.  Note that some architectures that
# are supported by FreeBSD do not include support for certain important
# aspects of this compatibility option, namely those related to the
# signal delivery mechanism.
#
options         COMPAT_43

# Old tty interface.
options         COMPAT_43TTY


The comment seems outdated since COMPAT_43 has been removed from GENERIC about
10 years now ;)

I'm also suggesting to disable those options by default now on NOTES.

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