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Date: Sat, 25 Apr 2009 12:25:28 -0500 (CDT)
From: Wes Morgan <morganw@chemikals.org>
To: current@freebsd.org
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Cc: 
Subject: COMPAT_FREEBSDn
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The various COMPAT_FREEBSDn options are part of generic, but are they 
needed for most users? Do they enable some structures or interfaces that 
some userland programs still expect, or is it safe to disable them 
assuming that I don't need to run binaries from older systems?