Remove $FreeBSD$: one-line sh pattern

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

pkgbase: Put ftp-proxy in the FreeBSD-pf package

It belongs here.
Also this unbloat FreeBSD-utilities a bit and it will not depend
on the FreeBSD-libevent1 package now.

Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D38226

(t)ftp-proxy: use libpfctl

Reviewed by: glebius
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29641

rename in-tree libevent v1 to libevent1

r316063 installed pf's embedded libevent as a private lib, with headers
in /usr/include/private/event. Unfortunately we also have a copy of
libevent v2 included in ntp, which needed to be updated for compatibility
with OpenSSL 1.1.

As unadorned 'libevent' generally refers to libevent v2, be explicit that
this one is libevent v1.

Reviewed by: vangyzen (earlier)
Differential Revision: https://reviews.freebsd.org/D17275

usr.sbin: normalize paths using SRCTOP-relative paths or :H when possible

This simplifies make logic/output

MFC after: 1 month
Sponsored by: Dell EMC Isilon

Convert usr.sbin to LIBADD
Reduce overlinking

Promote libevent to lib/ level and fold ftp-proxy into its parent Makefile.
This allows us to use libevent for other application in the future.

For now libevent is still INTERNALLIB and no shared library is installed.

MFC after: 1 month

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

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

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

Link pf 4.1 to the build:
- move ftp-proxy from libexec to usr.sbin
- add tftp-proxy
- new altq mtag link

Approved by: re (kensmith)