From owner-freebsd-questions@freebsd.org  Sat Sep 17 22:46:53 2016
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From: Baho Utot <baho-utot@columbus.rr.com>
Subject: base source: release vs releng
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Date: Sat, 17 Sep 2016 18:45:44 -0400
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As I understand this:

The difference between release and releng is that releng gets security 
fixes and "back ports/fixes" and release does not?

Or have I completely missed the boat and I am all wet?