All architectures enable NEW_PCIB in DEFAULTS (arm being the most recent
to do so in 121be555997b (arm: Set NEW_PCIB in DEFAULTS rather than a
subset of kernel configs")), so it's time we removed the legacy code
that no longer sees much testing and has a significant maintenance
burden.

Reviewed by:	jhb, andrew, emaste
Differential Revision:	https://reviews.freebsd.org/D32954

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

NETLINK is going to replace rtsock and a number of other ioctl/sysctl interfaces.
In-base utilies such as route(8), netstat(8) and soon ifconfig(8)
 are being converted to use netlink sockets as a transport between
 kernel and userland.
In the current configuration, it still possible have the kernel
 without NETLINK (`nooptions NETLINK`) and use the aforementioned
 utilies by buidling the world with `WITHOUT_NETLINK` src.conf knob.
However, this approach does not cover the cases when person unintentionally
 builds a custom kernel without netlink and tries to use the standard userland.

This change adds `option NETLINK` to the default options for each
 architecture, fixing the custom kernel issue.
For arm, this change uses `std.armv6` and `std.armv7` (netlink already in)
 instead of DEFAULTS.

Reviewed By: imp
Differential Revision: https://reviews.freebsd.org/D39339

This changes the default TCP Congestion Control (CC) to CUBIC.
For small, transactional exchanges (e.g. web objects <15kB), this
will not have a material effect. However, for long duration data
transfers, CUBIC allocates a slightly higher fraction of the
available bandwidth, when competing against NewReno CC.

Reviewed By: tuexen, mav, #transport, guest-ccui, emaste
Relnotes: Yes
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D36537

Define CC_NEWRENO in all the appropriate DEFAULTS and std.* config
files. It's the default congestion control algorithm.  Add code to cc.c
so that CC_DEFAULT is "newreno" if it's not overriden in the config
file.

Sponsored by: Netflix
Fixes: b8d60729deef ("tcp: Congestion control cleanup.")
Revired by: manu, hselasky, jhb, glebius, tuexen
Differential Revision:	https://reviews.freebsd.org/D32964

Requirements) systems from the projects/pseries branch. This in principle
includes all IBM POWER hardware released in the last 15 years with the
exception of POWER3-based systems when run in 64-bit mode. The main
development target, however, has been the PAPR logical partition support
that is the default target in KVM on POWER and QEMU -- mileage may vary
on actual hardware at present. Much of the heavy lifting here was done
by Andreas Tobler.

Approved by:	re (kib)

add them to GENERIC and GENERIC64. They are applicable to Apple H/W and not
at all for Book-E platforms.

platforms.
This will make every attempt to mount a non-mpsafe filesystem to the
kernel forbidden, unless it is expressely compiled with
VFS_ALLOW_NONMPSAFE option.

This patch is part of the effort of killing non-MPSAFE filesystems
from the tree.

No MFC is expected for this patch.

Tested on 32- and 64-bit PowerMac.

all the architectures.
The option allows to mount non-MPSAFE filesystem. Without it, the
kernel will refuse to mount a non-MPSAFE filesytem.

This patch is part of the effort of killing non-MPSAFE filesystems
from the tree.

No MFC is expected for this patch.

Tested by:	gianni
Reviewed by:	kib