Support NetBSD 10+ version of struct statvfs #4277
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Description
In #4265 (comment) it was suggested to update the NetBSD
struct statvfs
code for changes in NetBSD 10.See https://mail-index.netbsd.org/source-changes/2019/09/22/msg109266.html
I tested this code on NetBSD 10.99.12/x86_64 with bespoke test programs for
fstatvfs
,getmntinfo
,getvfsstat
, andstatvfs
.This code is not ready to merge yet, since it doesn't work on NetBSD 9, and I need some guidance on how to handle this.
Should we add versioning support like
freebsd12
etc. or is some other method preferred?