Remove $FreeBSD$: one-line sh pattern

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

sendmail: Silence -Wdeprecated-non-prototype warnings.

These will hopefully be fixed upstream eventually, but silence the
warnings until then.

Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D39518

Add -DSTARTTLS CFLAG in order to enable DANE in sendmail builds

Use SRCTOP-relative paths to other directories instead of .CURDIR-relative ones

This implifies pathing in make/displayed output

MFC after: 3 weeks
Sponsored by: Dell EMC Isilon

First pass through library packaging.

Sponsored by: The FreeBSD Foundation

META MODE: Don't create .meta files when symlinking sources into the obj directory.

Tracking these leads to situations where meta mode will consider the
file to be out of date if /bin/sh or /bin/ln are newer than the source
file. There's no reason for meta mode to do this as make is already
handling the rebuild dependency fine.

Sponsored by: EMC / Isilon Storage Division

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.

Build lib/ with WARNS=6 by default.

Similar to libexec/, do the same with lib/. Make WARNS=6 the norm and
lower it when needed.

I'm setting WARNS?=0 for secure/. It seems secure/ includes the
Makefile.inc provided by lib/. I'm not going to touch that directory.
Most of the code there is contributed anyway.

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

For variables that are only checked with defined(), don't provide
any fake value.

Remove MAINTAINER= lines from individual Makefiles in favor of the
MAINTAINER file (which already had entries for sendmail).

Removed now unused INTERNALSTATICLIB.
INTERNALLIB now implies NOPIC and NOPROFILE.
Removed gratuitous NOMAN.

Update build infrastructure for sendmail 8.12.

Add a MAINTAINER= line so people know who to blame

Give users a way to alter the sendmail (and related utilities) build
environment so they can enable functionality such as SASL, LDAP, Hesiod.

The rest of the changes needed to support the new version of sendmail (8.11.0).
Beyond changes to the build system, this includes fixing up the sample
freebsd.mc configuration for changes in defaults and syntax, removing
outdated documentation, and updating the release notes.