ctfdump: Use getprogname()

Also remove no longer used function `getpname()`.

Reviewed by: markj
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D38740

ctfdump: Remove definitions of warn() and vwarn()

The presence of the latter causes a link error when building a
statically linked ctfdump(1) because libc defines the same symbol.
libc's warn() is defined as a weak symbol and so does not cause the same
problem, but let's just use libc's version.

Reported by: stephane rochoy <stephane.rochoy@stormshield.eu>
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

ctf: Add v3 support to CTF tools, ctf{convert,dump,merge}

ctfdump handles v2 and v3. ctfconvert now emits only CTFv3, whereas
ctfmerge can merge v2 and v3 containers into v3 containers.

MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D34364

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.

Make this file compile cleanly.