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

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

Ignore a sub-topic match if it is inside the command description.
Otherwise, merge-help can get confused by a command description that
includes a word that starts with a capital S.

MFC after: 1 week

Initialize first to -1; this will create a (nearly) empty file on failure,
instead of looping until the disk is full. This kind of failure can
especially happen when a version of awk that doesn't support POSIX
character classes is used.

Submitted by: David Wolfskill <david@catwhisker.org>

Revert rev 1.3 which moved us away from POSIX character classes.
The community feels our base AWK must handle them.

Bell-Labs AWK does not support POSIX "bracket expressions" (POSIXese for
"character classes", basically). So change them to their character
representation.

Submitted by: David Wolfskill <david@catwhisker.org>

$Id$ -> $FreeBSD$

Transition from using Perl to using awk for our text-manipulation
needs. This removes the dependancy on Perl for the generation of the
loader, allowing the world to be built on a perl-free system.

Submitted by: Joe Abley <jabley@clear.co.nz>