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pfg
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2020-02-21T04:48:25.997144Z
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MFC r357414, r357415, r357417, r357423, r357424, r357587, r357655:
ethernet: add some more Ethertypes.

Add some types based on other BSDs and also add EtherCat, PROFINET, Powerlink
and Sercos III which are IEC standards.

There is a public list (CSV format) at:
	https://standards.ieee.org/products-services/regauth/

Spacing cleanups.
No functional change.

END