sys: Remove $FreeBSD$: one-line sh pattern

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

iicbb: Always build ofw_bus_if.h

Always make ofw_bus_if.h. While it's only used when option FDT is in the
kernel, it can always be generated. In theory we could omit it if option
FDT isn't present, but none of the rest of sys/modules does that. That
fine-grained control likely won't be reliable w/o a redesign of the
kernel/module config system.

Sponsored by: Netflix

Fix some modules to export more used symbols

and remove non-present symbols that are now reported by kmod_syms.awk.

Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32878

sys/modules: normalize .CURDIR-relative paths to SRCTOP

This simplifies make output/logic

Tested with: `cd sys/modules; make ALL_MODULES=` on amd64
MFC after: 1 month
Sponsored by: Dell EMC Isilon

Build ofw_bus_if.h for modules for RISC-V.

MIPS also needs ofw_bus_if.h in some cases.

Build ofw_bus_if.h for modules that need it on arm64

Fix build race on armv6* and powerpc*.
Tested with cross builds amd64 -> armv6(hf) and powerpc(64).

Suggested by: andrew@

Fix make depend.

Approved by: uqs

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

- Import the HEAD csup code which is the basis for the cvsmode work.

Major rework of the iicbus/smbus framework:

- VIA chipset SMBus controllers added
- alpm driver updated
- Support for dynamic modules added
- bktr FreeBSD smbus updated but not tested
- cleanup