Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

libm: Add missing END() directives for amd64 routines

No functional change. Related to D22122.

Reviewed by: emaste, kib (earlier version both)

Add section .note.GNU-stack for assembly files used by 386 and amd64.

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.

Use hardware remainder on amd64 since it is 5 to 10 times faster than
software remainder and is already used for remquo().