OPNSense/core 4fc9696src/etc config.xml.sample

sysct, remove duplicates. closes https://github.com/opnsense/core/issues/3410

(cherry picked from commit 6101ba8940f02888fd096f4e8e458624ec5f0ff2)
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+5-15src/etc/config.xml.sample
+5-151 files

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