tcpd: complete function prototypes.

This clears up at least a build issues on mysql-server
ports. While here also replace some spaces with tabs
in our headers.

PR: 42336
MFC after: 2 weeks

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.

Clean import of TCP-wrappers by Wietse Venema.
Rest of build to follow.