• Make the netlink_writer cookie an honest const ifnet pointer.
• Refactor some code to provide the new constness constraint.

I think I'll try my luck with http://manuals.opensound.com/developer/mmap_test.c.html first and fit it into our example and once the usleep version works, see what are the values of ptr compared to the ones in kqueue scenario. My thinking is "if I can't fix it, move to simpler example", which I'm hoping the official docs are. Anyway, I didn't give up on this code, I just need to approach it from the different angle, for now.

No longer immediately relevant after the revert. Worth discussing the venn diagram regarding __ISO_C_VISIBLE et al since there are gotchas in C as well.

Change to mimic strategy used in devel/glib20. Also I think portclippy didn't see the variables on stable/15 before so I had to change them to have leading '_' and at that point they can be up by LIB_DEPENDS.

Yeah this is probably bloat

s/series/family/ as the family includes e-series, thor series, etc.

We need that line because the entire hardware section appears verbaitm
in the Hardware Release Note. How's this? I also adjusted the document
description to a more similar style as other terabit ethernet drivers.

Haven't reviewed the constraints code yet, and some of the device plumbing.