Integrate github revision 0446821e49224c6a29be28760cc9c4cc14f56d8a as
suggested by upstream

https://github.com/the-tcpdump-group/libpcap/issues/327

Quiesce assignment warnings by use of const

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.

Revert previous commit that commented out some bpf functions.
Unconstify arguments of bpf_image(), bpf_filter() and bpf_dump(). This
is needed because some ports rely heavely on these arguments (some of
them even roll out their own implemenentations of bpf_dump).

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

Virgin import of libpcap v0.9.1 (alpha 096) from tcpdump.org

Import libpcap 0.8.3, from http://www.tcpdump.org/releases/libpcap-0.8.3.tar.gz

Virgin import of tcpdump.org libpcap v0.6.2