MFC r287649:
Use a common subroutine to fetch and zero protocol stats instead of
duplicating roughly similar code for each protocol.

MFC r290367, r290370, r290437:

Change to not truncate an interface name when -W option
is specified.

MFC Requested by: Jim Thompson <jim__at__netgate.com>

MFC r287406:

Divide statistics in the number of packets with 1000 instead of 1024
in human-readable form.

PR: 183598

o Provide a compatibility shim for netstat(1) to obtain output queue
drops via NET_RT_IFLISTL sysctl. The sysctl handler appends oqdrops
at the end of struct if_msghdrl, and netstat(1) sees that as an
additional field of struct if_data. This allows us to fetch the data
keeping ABI and API compatibility.
This is direct commit to stable/10.

o Merge r263331 from head, to restore printing of queue drops.

Sponsored by: Nginx, Inc.
Sponsored by: Netflix

Merge r259562,r259566,r259638,r259645,r260124 by melifaro:

Switch netstat -rn to use standard API for retrieving list
of routes instead of peeking inside in-kernel radix via kget.

Bulk sync of pf changes from head, in attempt to fixup broken build I
made in r263029.

Merge r257186,257215,257349,259736,261797.

These changesets split pfvar.h into several smaller headers and make
userland utilities to include only some of them.

Merged /head:r256510,256512,257376,257469,260052:

Make 'netstat -i' use getifaddrs(3) instead of kvm(3).

MFC r287406:

Divide statistics in the number of packets with 1000 instead of 1024
in human-readable form.

PR: 183598

o Provide a compatibility shim for netstat(1) to obtain output queue
drops via NET_RT_IFLISTL sysctl. The sysctl handler appends oqdrops
at the end of struct if_msghdrl, and netstat(1) sees that as an
additional field of struct if_data. This allows us to fetch the data
keeping ABI and API compatibility.
This is direct commit to stable/10.

o Merge r263331 from head, to restore printing of queue drops.

Sponsored by: Nginx, Inc.
Sponsored by: Netflix

Merge r259562,r259566,r259638,r259645,r260124 by melifaro:

Switch netstat -rn to use standard API for retrieving list
of routes instead of peeking inside in-kernel radix via kget.

Bulk sync of pf changes from head, in attempt to fixup broken build I
made in r263029.

Merge r257186,257215,257349,259736,261797.

These changesets split pfvar.h into several smaller headers and make
userland utilities to include only some of them.

Merged /head:r256510,256512,257376,257469,260052:

Make 'netstat -i' use getifaddrs(3) instead of kvm(3).