Remove $FreeBSD$: one-line sh pattern

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

Add missing src.opts.mk include

This was missed in r364221 so tests were not built.

Reviewed by: bdrewery
Obtained from: CheriBSD
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D27210

Add test to for FreeBSD-SA-19:20.bsnmp

Submitted by: Darrick Lew <darrick.freebsd at gmail.com>
Reviewed by: cem
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D26037

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.

Finish repo-copy of lib/libbsnmp/modules to usr.sbin/bsnmpd/modules.
These modules are modules for the daemon, not for the library so
they should be where the daemon is.

Clean up makefiles.

Reviewed by: harti

Add build infrastructure for libbsnmp and the modules. Add the
netgraph module for the SNMP daemon.