MFC of if_lagg flowid changes (r272386)?

[Will Andrews]

Hi,

Please see:
https://svnweb.freebsd.org/base?view=revision&revision=272386

This change removes sysctl nodes that were added during lacp_attach(), which
causes a lock order reversal (sleepable lock while holding non-sleepable).

These sysctl nodes arrived in:
https://svnweb.freebsd.org/base?view=revision&revision=253687

Here is a bug report about the LOR:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=188997

I propose to MFC r272386 to eliminate the bug.  However, it also eliminates
sysctl nodes that were added to control lagg behavior.  My understanding is
that these sysctls weren't intended to be publicly used, and consequently
they aren't documented anywhere.

Any objections?

Thanks!
-- 
wca
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