A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

MFC r208753:

Add required header for isalnum(3) to quench compiler warnings

Forgotten in: r174678
Submitted by: Alexander Best alexbestms at wwu.de
Approved by: das
Approved by: re (kib)

Add required header for isalnum(3) to quench compiler warnings

Forgotten in: r174678
Submitted by: Alexander Best alexbestms at wwu.de
Approved by: das

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.

Some changes the vendor didn't want:

- Accept the '0x' prefix so strtod("nan(0x...)", NULL) returns the same
thing as gcc's builtin nan("0x...") for such strings.
- Don't return uninitialized memory.
- Finish processing the string up to the closing ')' (provided it's
lexically valid) for compatibility with C99 and *scanf().

Import of the latest gdtoa sources, which include fixes for minor
problems relating to NaNs and rounding.

Initial import of David Gay's gdtoa library for conversion between
strings and floating point.