usr.bin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line nroff pattern

Remove /^\.\\"\s*\$FreeBSD\$$\n/

Adjust history, info source from v1's manuals
https://www.bell-labs.com/usr/dmr/www/1stEdman.html

MFC after: 5 days

dc(1): fix modulo operations with fractional inputs

Our dc(1) has never correctly calculated remainders with fractional inputs.
Both bmod and bdivmod seem to have copy/pasted code from bdiv, which results
in the remainder having the wrong output scale.

PR: 162495
Reported by: anonymous
Reviewed by: pfg
Differential Revision: https://reviews.freebsd.org/D13390

dc(1): Introduce e command, equivalent to p, but writes to stderr

Obtained from: OpenBSD
MFC after: 2 weeks

Sync with OpenBSD.

MFC after: 2 weeks

Minor mdoc nits.

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.

- Collapase short and long options together;
- Use consistent marking up with bc(1)'s reference section.

Reviewed by: gabor

Replace GNU bc/dc with BSDL versions ported from OpenBSD. They have a good
compatibility level with the GNU counterparts and have shown to be mature
enough. For now, the GNU versions aren't removed from the tree, just detached
from the build.

Sponsored by: Google Summer of Code 2008
Portbuild run by: erwin
Approved by: delphij