Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Rename documentation source files to avoid filesystem case and restricted
filename issues when checking out the source on other operating systems.

I've verified the generated paper.ascii is identical before and after the
change.

Remove original license disclaimer.
Add Caldera license.

Approved by: David Taylor <davidt@caldera.com>

Make roughly buildable under FreeBSD.

The results are not perfect: the original Makefile referred to a refer
file papers/Ind, which doesn't seem to have been kept, so the
references to other publications are missing. In addition, the
pagination is not correct, with the result that some .DS/.DE blocks
leave large amounts of white space empty before them. Possibly this
could be fixed by putting the (blank) footnotes at the end.

PR: 35345
Requested by: Tony Finch <fanf@dotat.at>

Initial checkin: 4.4BSD version. These files need to be updated with
current license information and adapted to the FreeBSD build
environment before they will build.

Approved by: David Taylor <davidt@caldera.com>