MFC 308908,308909
308908
hyperv/hn: Allow enabling IPv6 TX checksum offloading and IPv6 TSO.
They are still disabled by default.
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8490
308909
hyperv/hn: Don't abuse hn_{tx,rx}_ring_inuse.
Just in case, the # of TX/RX rings is changed upon synthetic parts
re-attach.
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8520
git-svn-id: svn://svn.freebsd.org/base/stable/10@310739
ccf9f872-aa2e-dd11-9fc8-
001c23d0bc1f