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.

For variables that are only checked with defined(), don't provide
any fake value.

Fixes to get rid of CD_HACK.

bsd.doc.mk changes:

Don't gratuitously pipe thru a cat(1) if NODOCCOMPRESS.

Only create _stamp.extra when necessary.

Get rid of SOELIMPP and OBJS.

Use Groff version of soelim(1); we need its -I option
for the following to work.

Don't needlessly chdir to SRCDIR. Only a few documents
need CD_HACK, and those that need it either use refer(1)
or .PSPIC macro which internally uses the .psbb call.

Fixed references and a bunch of other warnings.

Fixed build of recently added legacy docs.

Reviewed by: grog

Unbreak world.

Obtained from: mark
Pointy hat to: grog

Change msU macros to mU.

This is only a partial solution; the whole issue of building the
documentation needs to be revisited.

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>